155148931 has 4 divisors (see below), whose sum is σ = 177313072. Its totient is φ = 132984792.

The previous prime is 155148913. The next prime is 155148941. The reversal of 155148931 is 139841551.

155148931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155148931 - 2¹⁷ = 155017859 is a prime.

It is a super-2 number, since 2×155148931² = 48142381580885522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155148901) 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, 11082060 + ... + 11082073.

It is an arithmetic number, because the mean of its divisors is an integer number (44328268).

Almost surely, 2^155148931 is an apocalyptic number.

155148931 is a deficient number, since it is larger than the sum of its proper divisors (22164141).

155148931 is an equidigital number, since it uses as much as digits as its factorization.

155148931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164140.

The product of its digits is 21600, while the sum is 37.

The square root of 155148931 is about 12455.8793748173. The cubic root of 155148931 is about 537.3405256836.

The spelling of 155148931 in words is "one hundred fifty-five million, one hundred forty-eight thousand, nine hundred thirty-one".