155263631 has 2 divisors, whose sum is σ = 155263632. Its totient is φ = 155263630.

The previous prime is 155263613. The next prime is 155263637. The reversal of 155263631 is 136362551.

Together with previous prime (155263613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155263631 is a prime.

It is a super-2 number, since 2×155263631² = 48213590222608322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155263637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77631815 + 77631816.

It is an arithmetic number, because the mean of its divisors is an integer number (77631816).

Almost surely, 2^155263631 is an apocalyptic number.

155263631 is a deficient number, since it is larger than the sum of its proper divisors (1).

155263631 is an equidigital number, since it uses as much as digits as its factorization.

155263631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 155263631 is about 12460.4827755589. The cubic root of 155263631 is about 537.4729098299.

The spelling of 155263631 in words is "one hundred fifty-five million, two hundred sixty-three thousand, six hundred thirty-one".