45164421 has 6 divisors (see below), whose sum is σ = 65237510. Its totient is φ = 30109608.

The previous prime is 45164419. The next prime is 45164437. The reversal of 45164421 is 12446154.

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 408321 = 6690^2 + 639^2 .

It is not a de Polignac number, because 45164421 - 2¹ = 45164419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45164401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2509126 + ... + 2509143.

Almost surely, 2^45164421 is an apocalyptic number.

It is an amenable number.

45164421 is a deficient number, since it is larger than the sum of its proper divisors (20073089).

45164421 is a wasteful number, since it uses less digits than its factorization.

45164421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018275 (or 5018272 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 45164421 is about 6720.4479761397. The cubic root of 45164421 is about 356.1220097934.

The spelling of 45164421 in words is "forty-five million, one hundred sixty-four thousand, four hundred twenty-one".