45220251 has 16 divisors (see below), whose sum is σ = 63705600. Its totient is φ = 28485408.

The previous prime is 45220249. The next prime is 45220271. The reversal of 45220251 is 15202254.

It is a happy number.

It is not a de Polignac number, because 45220251 - 2¹ = 45220249 is a prime.

It is a super-2 number, since 2×45220251² = 4089742201006002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45220211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441 + ... + 9618.

It is an arithmetic number, because the mean of its divisors is an integer number (3981600).

Almost surely, 2^45220251 is an apocalyptic number.

45220251 is a deficient number, since it is larger than the sum of its proper divisors (18485349).

45220251 is a wasteful number, since it uses less digits than its factorization.

45220251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11138.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 45220251 is about 6724.6004342266. The cubic root of 45220251 is about 356.2686894473.

The spelling of 45220251 in words is "forty-five million, two hundred twenty thousand, two hundred fifty-one".