15455220000 has 240 divisors, whose sum is σ = 55307320992. Its totient is φ = 3746560000.

The previous prime is 15455219993. The next prime is 15455220007. The reversal of 15455220000 is 2255451.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15455219993) and next prime (15455220007).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (15455220007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 648292 + ... + 671708.

Almost surely, 2^15455220000 is an apocalyptic number.

15455220000 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 15455220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27653660496).

15455220000 is an abundant number, since it is smaller than the sum of its proper divisors (39852100992).

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

15455220000 is a wasteful number, since it uses less digits than its factorization.

15455220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23461 (or 23438 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 15455220000 its reverse (2255451), we get a palindrome (15457475451).

The spelling of 15455220000 in words is "fifteen billion, four hundred fifty-five million, two hundred twenty thousand".