155540252 has 12 divisors (see below), whose sum is σ = 311080560. Its totient is φ = 66660096.

The previous prime is 155540243. The next prime is 155540261. The reversal of 155540252 is 252045551.

It is an interprime number because it is at equal distance from previous prime (155540243) and next prime (155540261).

155540252 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777477 + ... + 2777532.

It is an arithmetic number, because the mean of its divisors is an integer number (25923380).

Almost surely, 2^155540252 is an apocalyptic number.

It is an amenable number.

155540252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

155540252 is a wasteful number, since it uses less digits than its factorization.

155540252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555020 (or 5555018 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 155540252 is about 12471.5777670670. The cubic root of 155540252 is about 537.7919115287.

The spelling of 155540252 in words is "one hundred fifty-five million, five hundred forty thousand, two hundred fifty-two".