155868427 has 32 divisors (see below), whose sum is σ = 196185024. Its totient is φ = 121651200.

The previous prime is 155868409. The next prime is 155868451. The reversal of 155868427 is 724868551.

It is a de Polignac number, because none of the positive numbers 2^k-155868427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155868407) 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 31 ways as a sum of consecutive naturals, for example, 235477 + ... + 236137.

It is an arithmetic number, because the mean of its divisors is an integer number (6130782).

Almost surely, 2^155868427 is an apocalyptic number.

155868427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

155868427 is a deficient number, since it is larger than the sum of its proper divisors (40316597).

155868427 is a wasteful number, since it uses less digits than its factorization.

155868427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its digits is 537600, while the sum is 46.

The square root of 155868427 is about 12484.7277503356. The cubic root of 155868427 is about 538.1698755991.

The spelling of 155868427 in words is "one hundred fifty-five million, eight hundred sixty-eight thousand, four hundred twenty-seven".