155278752 has 48 divisors (see below), whose sum is σ = 420763392. Its totient is φ = 50088960.

The previous prime is 155278723. The next prime is 155278759. The reversal of 155278752 is 257872551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×155278752² = 48222981645355008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155278759) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23113 + ... + 29064.

It is an arithmetic number, because the mean of its divisors is an integer number (8765904).

Almost surely, 2^155278752 is an apocalyptic number.

155278752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155278752 is an abundant number, since it is smaller than the sum of its proper divisors (265484640).

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

155278752 is a wasteful number, since it uses less digits than its factorization.

155278752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52221 (or 52213 counting only the distinct ones).

The product of its digits is 196000, while the sum is 42.

The square root of 155278752 is about 12461.0895189787. The cubic root of 155278752 is about 537.4903572815.

The spelling of 155278752 in words is "one hundred fifty-five million, two hundred seventy-eight thousand, seven hundred fifty-two".