45331531 has 8 divisors (see below), whose sum is σ = 51906560. Its totient is φ = 38781288.

The previous prime is 45331523. The next prime is 45331541. The reversal of 45331531 is 13513354.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45331531 - 2³ = 45331523 is a prime.

It is a super-2 number, since 2×45331531² = 4109895405607922, 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 = 45331496 and 45331505.

It is not an unprimeable number, because it can be changed into a prime (45331541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2091 + ... + 9748.

It is an arithmetic number, because the mean of its divisors is an integer number (6488320).

Almost surely, 2^45331531 is an apocalyptic number.

45331531 is a deficient number, since it is larger than the sum of its proper divisors (6575029).

45331531 is a wasteful number, since it uses less digits than its factorization.

45331531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12393.

The product of its digits is 2700, while the sum is 25.

The square root of 45331531 is about 6732.8694477169. The cubic root of 45331531 is about 356.5606906543.

Adding to 45331531 its reverse (13513354), we get a palindrome (58844885).

The spelling of 45331531 in words is "forty-five million, three hundred thirty-one thousand, five hundred thirty-one".