45021563 has 4 divisors (see below), whose sum is σ = 46238400. Its totient is φ = 43804728.

The previous prime is 45021551. The next prime is 45021569. The reversal of 45021563 is 36512054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36512054 = 2 ⋅18256027.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45021563 is a prime.

It is a super-2 number, since 2×45021563² = 4053882269925938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45021569) 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, 608363 + ... + 608436.

It is an arithmetic number, because the mean of its divisors is an integer number (11559600).

Almost surely, 2^45021563 is an apocalyptic number.

45021563 is a deficient number, since it is larger than the sum of its proper divisors (1216837).

45021563 is a wasteful number, since it uses less digits than its factorization.

45021563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216836.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 45021563 is about 6709.8109511371. The cubic root of 45021563 is about 355.7461341846.

The spelling of 45021563 in words is "forty-five million, twenty-one thousand, five hundred sixty-three".