65038531 has 2 divisors, whose sum is σ = 65038532. Its totient is φ = 65038530.

The previous prime is 65038513. The next prime is 65038541. The reversal of 65038531 is 13583056.

Together with previous prime (65038513) 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 not a de Polignac number, because 65038531 - 2⁵ = 65038499 is a prime.

It is a super-2 number, since 2×65038531² = 8460021029275922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65038493 and 65038502.

It is not a weakly prime, because it can be changed into another prime (65038541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32519265 + 32519266.

It is an arithmetic number, because the mean of its divisors is an integer number (32519266).

Almost surely, 2^65038531 is an apocalyptic number.

65038531 is a deficient number, since it is larger than the sum of its proper divisors (1).

65038531 is an equidigital number, since it uses as much as digits as its factorization.

65038531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 65038531 is about 8064.6469854545. The cubic root of 65038531 is about 402.1520076447.

The spelling of 65038531 in words is "sixty-five million, thirty-eight thousand, five hundred thirty-one".