155402221530000 has 200 divisors, whose sum is σ = 501688119512448. Its totient is φ = 41438194496000.

The previous prime is 155402221529981. The next prime is 155402221530019. The reversal of 155402221530000 is 35122204551.

It is an interprime number because it is at equal distance from previous prime (155402221529981) and next prime (155402221530019).

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 155402221530000.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 552249337 + ... + 552530663.

Almost surely, 2^{155402221530000} is an apocalyptic number.

155402221530000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155402221530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250844059756224).

155402221530000 is an abundant number, since it is smaller than the sum of its proper divisors (346285897982448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155402221530000 is a wasteful number, since it uses less digits than its factorization.

155402221530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299771 (or 299750 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 155402221530000 its reverse (35122204551), we get a palindrome (155437343734551).

The spelling of 155402221530000 in words is "one hundred fifty-five trillion, four hundred two billion, two hundred twenty-one million, five hundred thirty thousand".