6115531 has 2 divisors, whose sum is σ = 6115532. Its totient is φ = 6115530.

The previous prime is 6115513. The next prime is 6115537. The reversal of 6115531 is 1355116.

Together with previous prime (6115513) 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 6115531 - 2²¹ = 4018379 is a prime.

It is a super-2 number, since 2×6115531² = 74799438823922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6115537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3057765 + 3057766.

It is an arithmetic number, because the mean of its divisors is an integer number (3057766).

Almost surely, 2^6115531 is an apocalyptic number.

6115531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6115531 is an equidigital number, since it uses as much as digits as its factorization.

6115531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 6115531 is about 2472.9599673266. The cubic root of 6115531 is about 182.8709512510.

The spelling of 6115531 in words is "six million, one hundred fifteen thousand, five hundred thirty-one".