45421631 has 4 divisors (see below), whose sum is σ = 46477992. Its totient is φ = 44365272.

The previous prime is 45421589. The next prime is 45421643. The reversal of 45421631 is 13612454.

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 45421631 - 2⁶ = 45421567 is a prime.

It is a super-2 number, since 2×45421631² = 4126249125400322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45421631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45421031) 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, 528116 + ... + 528201.

It is an arithmetic number, because the mean of its divisors is an integer number (11619498).

Almost surely, 2^45421631 is an apocalyptic number.

45421631 is a deficient number, since it is larger than the sum of its proper divisors (1056361).

45421631 is a wasteful number, since it uses less digits than its factorization.

45421631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056360.

The product of its digits is 2880, while the sum is 26.

The square root of 45421631 is about 6739.5571812991. The cubic root of 45421631 is about 356.7967651672.

The spelling of 45421631 in words is "forty-five million, four hundred twenty-one thousand, six hundred thirty-one".