45251661 has 32 divisors (see below), whose sum is σ = 76668928. Its totient is φ = 23094720.

The previous prime is 45251651. The next prime is 45251663. The reversal of 45251661 is 16615254.

It is not a de Polignac number, because 45251661 - 2⁷ = 45251533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45251663) 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, 5790 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (2395904).

Almost surely, 2^45251661 is an apocalyptic number.

It is an amenable number.

45251661 is a deficient number, since it is larger than the sum of its proper divisors (31417267).

45251661 is a wasteful number, since it uses less digits than its factorization.

45251661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5401.

The product of its digits is 7200, while the sum is 30.

The square root of 45251661 is about 6726.9354835616. The cubic root of 45251661 is about 356.3511584690.

The spelling of 45251661 in words is "forty-five million, two hundred fifty-one thousand, six hundred sixty-one".