155240022 has 64 divisors (see below), whose sum is σ = 384943104. Its totient is φ = 40719360.

The previous prime is 155240017. The next prime is 155240053. The reversal of 155240022 is 220042551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26623 + ... + 31925.

It is an arithmetic number, because the mean of its divisors is an integer number (6014736).

Almost surely, 2^155240022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155240022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192471552).

155240022 is an abundant number, since it is smaller than the sum of its proper divisors (229703082).

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

155240022 is a wasteful number, since it uses less digits than its factorization.

155240022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 155240022 is about 12459.5353845960. The cubic root of 155240022 is about 537.4456661862.

Adding to 155240022 its reverse (220042551), we get a palindrome (375282573).

The spelling of 155240022 in words is "one hundred fifty-five million, two hundred forty thousand, twenty-two".