45520218 has 36 divisors (see below), whose sum is σ = 102444810. Its totient is φ = 15169032.

The previous prime is 45520201. The next prime is 45520231. The reversal of 45520218 is 81202554.

It is a happy number.

45520218 is a `hidden beast` number, since 455 + 202 + 1 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45198729 + 321489 = 6723^2 + 567^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 45520191 and 45520200.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11388 + ... + 14856.

Almost surely, 2^45520218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45520218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51222405).

45520218 is an abundant number, since it is smaller than the sum of its proper divisors (56924592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45520218 is an frugal number, since it uses more digits than its factorization.

45520218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495 (or 3474 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 45520218 is about 6746.8672730387. The cubic root of 45520218 is about 357.0547193859.

The spelling of 45520218 in words is "forty-five million, five hundred twenty thousand, two hundred eighteen".