155438204 has 12 divisors (see below), whose sum is σ = 272704824. Its totient is φ = 77522544.

The previous prime is 155438203. The next prime is 155438237. The reversal of 155438204 is 402834551.

155438204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155438204² = 48322070525491232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155438201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47354 + ... + 50529.

It is an arithmetic number, because the mean of its divisors is an integer number (22725402).

Almost surely, 2^155438204 is an apocalyptic number.

It is an amenable number.

155438204 is a deficient number, since it is larger than the sum of its proper divisors (117266620).

155438204 is a wasteful number, since it uses less digits than its factorization.

155438204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98284 (or 98282 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 155438204 is about 12467.4858732625. The cubic root of 155438204 is about 537.6742729650.

The spelling of 155438204 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, two hundred four".