136372531 has 2 divisors, whose sum is σ = 136372532. Its totient is φ = 136372530.

The previous prime is 136372513. The next prime is 136372549. The reversal of 136372531 is 135273631.

Together with previous prime (136372513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (136372513) and next prime (136372549).

It is a cyclic number.

It is not a de Polignac number, because 136372531 - 2⁵ = 136372499 is a prime.

It is a super-2 number, since 2×136372531² = 37194934422691922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136372493 and 136372502.

It is not a weakly prime, because it can be changed into another prime (136372571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68186265 + 68186266.

It is an arithmetic number, because the mean of its divisors is an integer number (68186266).

Almost surely, 2^136372531 is an apocalyptic number.

136372531 is the 5223-rd centered decagonal number.

136372531 is a deficient number, since it is larger than the sum of its proper divisors (1).

136372531 is an equidigital number, since it uses as much as digits as its factorization.

136372531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 136372531 is about 11677.8650017886. The cubic root of 136372531 is about 514.7254401027.

The spelling of 136372531 in words is "one hundred thirty-six million, three hundred seventy-two thousand, five hundred thirty-one".