155309427 has 32 divisors (see below), whose sum is σ = 283189760. Its totient is φ = 81920160.

The previous prime is 155309383. The next prime is 155309431. The reversal of 155309427 is 724903551.

155309427 is a `hidden beast` number, since 15 + 530 + 94 + 27 = 666.

155309427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155309427 - 2¹⁸ = 155047283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155309391 and 155309400.

It is not an unprimeable number, because it can be changed into a prime (155309437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29149 + ... + 34062.

It is an arithmetic number, because the mean of its divisors is an integer number (8849680).

Almost surely, 2^155309427 is an apocalyptic number.

155309427 is a deficient number, since it is larger than the sum of its proper divisors (127880333).

155309427 is a wasteful number, since it uses less digits than its factorization.

155309427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63240 (or 63234 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 155309427 is about 12462.3202895769. The cubic root of 155309427 is about 537.5257483249.

The spelling of 155309427 in words is "one hundred fifty-five million, three hundred nine thousand, four hundred twenty-seven".