45644231 has 4 divisors (see below), whose sum is σ = 47218200. Its totient is φ = 44070264.

The previous prime is 45644227. The next prime is 45644233. The reversal of 45644231 is 13244654.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45644231 - 2² = 45644227 is a prime.

It is a super-2 number, since 2×45644231² = 4166791647162722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1573939 = 45644231 / (4 + 5 + 6 + 4 + 4 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45644194 and 45644203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45644233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786941 + ... + 786998.

It is an arithmetic number, because the mean of its divisors is an integer number (11804550).

Almost surely, 2^45644231 is an apocalyptic number.

45644231 is a deficient number, since it is larger than the sum of its proper divisors (1573969).

45644231 is a wasteful number, since it uses less digits than its factorization.

45644231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573968.

The product of its digits is 11520, while the sum is 29.

The square root of 45644231 is about 6756.0514355650. The cubic root of 45644231 is about 357.3786727025.

Adding to 45644231 its reverse (13244654), we get a palindrome (58888885).

The spelling of 45644231 in words is "forty-five million, six hundred forty-four thousand, two hundred thirty-one".