4090991531 has 32 divisors (see below), whose sum is σ = 4790016000. Its totient is φ = 3456830080.

The previous prime is 4090991519. The next prime is 4090991549. The reversal of 4090991531 is 1351990904.

It is not a de Polignac number, because 4090991531 - 2²² = 4086797227 is a prime.

It is a super-2 number, since 2×4090991531² = 33472423413427447922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4090991561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1770605 + ... + 1772913.

It is an arithmetic number, because the mean of its divisors is an integer number (149688000).

Almost surely, 2^4090991531 is an apocalyptic number.

4090991531 is a deficient number, since it is larger than the sum of its proper divisors (699024469).

4090991531 is a wasteful number, since it uses less digits than its factorization.

4090991531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 4090991531 is about 63960.8593672724. The cubic root of 4090991531 is about 1599.3475896105.

The spelling of 4090991531 in words is "four billion, ninety million, nine hundred ninety-one thousand, five hundred thirty-one".