45720131 has 2 divisors, whose sum is σ = 45720132. Its totient is φ = 45720130.

The previous prime is 45720121. The next prime is 45720149. The reversal of 45720131 is 13102754.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45720131 is a prime.

It is a super-2 number, since 2×45720131² = 4180660757314322, 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 = 45720097 and 45720106.

It is not a weakly prime, because it can be changed into another prime (45720121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22860065 + 22860066.

It is an arithmetic number, because the mean of its divisors is an integer number (22860066).

Almost surely, 2^45720131 is an apocalyptic number.

45720131 is a deficient number, since it is larger than the sum of its proper divisors (1).

45720131 is an equidigital number, since it uses as much as digits as its factorization.

45720131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 45720131 is about 6761.6662887191. Note that the first 3 decimals coincide. The cubic root of 45720131 is about 357.5766533270.

Adding to 45720131 its reverse (13102754), we get a palindrome (58822885).

The spelling of 45720131 in words is "forty-five million, seven hundred twenty thousand, one hundred thirty-one".