45221661 has 12 divisors (see below), whose sum is σ = 66710592. Its totient is φ = 29506056.

The previous prime is 45221651. The next prime is 45221663. The reversal of 45221661 is 16612254.

It is not a de Polignac number, because 45221661 - 2⁵ = 45221629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45221663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53031 + ... + 53876.

It is an arithmetic number, because the mean of its divisors is an integer number (5559216).

Almost surely, 2^45221661 is an apocalyptic number.

It is an amenable number.

45221661 is a deficient number, since it is larger than the sum of its proper divisors (21488931).

45221661 is a wasteful number, since it uses less digits than its factorization.

45221661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106960 (or 106957 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 45221661 is about 6724.7052723521. The cubic root of 45221661 is about 356.2723923136.

The spelling of 45221661 in words is "forty-five million, two hundred twenty-one thousand, six hundred sixty-one".