45221631 has 32 divisors (see below), whose sum is σ = 74769408. Its totient is φ = 23673600.

The previous prime is 45221629. The next prime is 45221651. The reversal of 45221631 is 13612254.

It is not a de Polignac number, because 45221631 - 2¹ = 45221629 is a prime.

It is a super-2 number, since 2×45221631² = 4089991820600322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45221621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40675 + ... + 41771.

It is an arithmetic number, because the mean of its divisors is an integer number (2336544).

Almost surely, 2^45221631 is an apocalyptic number.

45221631 is a deficient number, since it is larger than the sum of its proper divisors (29547777).

45221631 is a wasteful number, since it uses less digits than its factorization.

45221631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271.

The product of its digits is 1440, while the sum is 24.

The square root of 45221631 is about 6724.7030417707. The cubic root of 45221631 is about 356.2723135300.

Adding to 45221631 its reverse (13612254), we get a palindrome (58833885).

The spelling of 45221631 in words is "forty-five million, two hundred twenty-one thousand, six hundred thirty-one".