155038923 has 12 divisors (see below), whose sum is σ = 241171840. Its totient is φ = 95408496.

The previous prime is 155038921. The next prime is 155038969. The reversal of 155038923 is 329830551.

155038923 is a `hidden beast` number, since 1 + 550 + 3 + 89 + 23 = 666.

It is not a de Polignac number, because 155038923 - 2¹ = 155038921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155038921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 662443 + ... + 662676.

Almost surely, 2^155038923 is an apocalyptic number.

155038923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

155038923 is a deficient number, since it is larger than the sum of its proper divisors (86132917).

155038923 is a wasteful number, since it uses less digits than its factorization.

155038923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325138 (or 1325135 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 155038923 is about 12451.4626851627. The cubic root of 155038923 is about 537.2134956257.

It can be divided in two parts, 155038 and 923, that added together give a triangular number (155961 = T₅₅₈).

The spelling of 155038923 in words is "one hundred fifty-five million, thirty-eight thousand, nine hundred twenty-three".