45325981 has 4 divisors (see below), whose sum is σ = 45424764. Its totient is φ = 45227200.

The previous prime is 45325967. The next prime is 45325993. The reversal of 45325981 is 18952354.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30349081 + 14976900 = 5509^2 + 3870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45325981 is a prime.

It is a super-2 number, since 2×45325981² = 4108889107224722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45325981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45325901) 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, 48700 + ... + 49621.

It is an arithmetic number, because the mean of its divisors is an integer number (11356191).

Almost surely, 2^45325981 is an apocalyptic number.

It is an amenable number.

45325981 is a deficient number, since it is larger than the sum of its proper divisors (98783).

45325981 is an equidigital number, since it uses as much as digits as its factorization.

45325981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98782.

The product of its digits is 43200, while the sum is 37.

The square root of 45325981 is about 6732.4572779929. The cubic root of 45325981 is about 356.5461386596.

The spelling of 45325981 in words is "forty-five million, three hundred twenty-five thousand, nine hundred eighty-one".