45881531 has 2 divisors, whose sum is σ = 45881532. Its totient is φ = 45881530.

The previous prime is 45881489. The next prime is 45881543. The reversal of 45881531 is 13518854.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45881531 - 2¹⁴ = 45865147 is a prime.

It is a super-2 number, since 2×45881531² = 4210229773807922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45881491 and 45881500.

It is not a weakly prime, because it can be changed into another prime (45881551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22940765 + 22940766.

It is an arithmetic number, because the mean of its divisors is an integer number (22940766).

Almost surely, 2^45881531 is an apocalyptic number.

45881531 is a deficient number, since it is larger than the sum of its proper divisors (1).

45881531 is an equidigital number, since it uses as much as digits as its factorization.

45881531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 35.

The square root of 45881531 is about 6773.5907021313. The cubic root of 45881531 is about 357.9969283883.

The spelling of 45881531 in words is "forty-five million, eight hundred eighty-one thousand, five hundred thirty-one".