45405531 has 6 divisors (see below), whose sum is σ = 65585780. Its totient is φ = 30270348.

The previous prime is 45405527. The next prime is 45405541. The reversal of 45405531 is 13550454.

It is not a de Polignac number, because 45405531 - 2² = 45405527 is a prime.

It is a super-2 number, since 2×45405531² = 4123324490783922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45405495 and 45405504.

It is not an unprimeable number, because it can be changed into a prime (45405511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2522521 + ... + 2522538.

Almost surely, 2^45405531 is an apocalyptic number.

45405531 is a deficient number, since it is larger than the sum of its proper divisors (20180249).

45405531 is a wasteful number, since it uses less digits than its factorization.

45405531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045065 (or 5045062 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 45405531 is about 6738.3626349433. The cubic root of 45405531 is about 356.7546038545.

Adding to 45405531 its reverse (13550454), we get a palindrome (58955985).

The spelling of 45405531 in words is "forty-five million, four hundred five thousand, five hundred thirty-one".