155123930 has 16 divisors (see below), whose sum is σ = 300702024. Its totient is φ = 57276480.

The previous prime is 155123911. The next prime is 155123933. The reversal of 155123930 is 39321551.

It can be written as a sum of positive squares in 4 ways, for example, as 126405049 + 28718881 = 11243^2 + 5359^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155123893 and 155123902.

It is not an unprimeable number, because it can be changed into a prime (155123933) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 596501 + ... + 596760.

Almost surely, 2^155123930 is an apocalyptic number.

155123930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155123930 is a deficient number, since it is larger than the sum of its proper divisors (145578094).

155123930 is a wasteful number, since it uses less digits than its factorization.

155123930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193281.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 155123930 is about 12454.8757520900. The cubic root of 155123930 is about 537.3116614346.

The spelling of 155123930 in words is "one hundred fifty-five million, one hundred twenty-three thousand, nine hundred thirty".