155112631 has 2 divisors, whose sum is σ = 155112632. Its totient is φ = 155112630.

The previous prime is 155112563. The next prime is 155112647. The reversal of 155112631 is 136211551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155112631 - 2⁹ = 155112119 is a prime.

It is a super-2 number, since 2×155112631² = 48119856591484322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155112596 and 155112605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155112031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77556315 + 77556316.

It is an arithmetic number, because the mean of its divisors is an integer number (77556316).

Almost surely, 2^155112631 is an apocalyptic number.

155112631 is a deficient number, since it is larger than the sum of its proper divisors (1).

155112631 is an equidigital number, since it uses as much as digits as its factorization.

155112631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 155112631 is about 12454.4221463703. The cubic root of 155112631 is about 537.2986154529.

The spelling of 155112631 in words is "one hundred fifty-five million, one hundred twelve thousand, six hundred thirty-one".