45520251 has 16 divisors (see below), whose sum is σ = 69460224. Its totient is φ = 25975584.

The previous prime is 45520247. The next prime is 45520259. The reversal of 45520251 is 15202554.

It is a happy number.

It is not a de Polignac number, because 45520251 - 2² = 45520247 is a prime.

It is a super-2 number, since 2×45520251² = 4144186502206002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45520259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24580 + ... + 26366.

It is an arithmetic number, because the mean of its divisors is an integer number (4341264).

Almost surely, 2^45520251 is an apocalyptic number.

45520251 is a deficient number, since it is larger than the sum of its proper divisors (23939973).

45520251 is a wasteful number, since it uses less digits than its factorization.

45520251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 45520251 is about 6746.8697186177. The cubic root of 45520251 is about 357.0548056684.

It can be divided in two parts, 455 and 20251, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 45520251 in words is "forty-five million, five hundred twenty thousand, two hundred fifty-one".