63157531 has 2 divisors, whose sum is σ = 63157532. Its totient is φ = 63157530.

The previous prime is 63157487. The next prime is 63157559. The reversal of 63157531 is 13575136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63157531 - 2⁹ = 63157019 is a prime.

It is a super-2 number, since 2×63157531² = 7977747444031922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63157493 and 63157502.

It is not a weakly prime, because it can be changed into another prime (63157561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31578765 + 31578766.

It is an arithmetic number, because the mean of its divisors is an integer number (31578766).

Almost surely, 2^63157531 is an apocalyptic number.

63157531 is a deficient number, since it is larger than the sum of its proper divisors (1).

63157531 is an equidigital number, since it uses as much as digits as its factorization.

63157531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 31.

The square root of 63157531 is about 7947.1712577495. The cubic root of 63157531 is about 398.2370981064.

The spelling of 63157531 in words is "sixty-three million, one hundred fifty-seven thousand, five hundred thirty-one".