155072052 has 18 divisors (see below), whose sum is σ = 391987778. Its totient is φ = 51690672.

The previous prime is 155072051. The next prime is 155072059. The reversal of 155072052 is 250270551.

It is a happy number.

155072052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 140280336 + 14791716 = 11844^2 + 3846^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×155072052² = 48094682622981408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155072051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2153743 + ... + 2153814.

Almost surely, 2^155072052 is an apocalyptic number.

155072052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155072052 is an abundant number, since it is smaller than the sum of its proper divisors (236915726).

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

155072052 is a wasteful number, since it uses less digits than its factorization.

155072052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307567 (or 4307562 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 155072052 is about 12452.7929397385. The cubic root of 155072052 is about 537.2517571539.

The spelling of 155072052 in words is "one hundred fifty-five million, seventy-two thousand, fifty-two".