45220981 has 8 divisors (see below), whose sum is σ = 48752480. Its totient is φ = 41697072.

The previous prime is 45220979. The next prime is 45221021. The reversal of 45220981 is 18902254.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45220981 - 2¹ = 45220979 is a prime.

It is a super-2 number, since 2×45220981² = 4089874245204722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45220961) 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 7 ways as a sum of consecutive naturals, for example, 19426 + ... + 21628.

It is an arithmetic number, because the mean of its divisors is an integer number (6094060).

Almost surely, 2^45220981 is an apocalyptic number.

It is an amenable number.

45220981 is a deficient number, since it is larger than the sum of its proper divisors (3531499).

45220981 is a wasteful number, since it uses less digits than its factorization.

45220981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 45220981 is about 6724.6547123254. The cubic root of 45220981 is about 356.2706065437.

The spelling of 45220981 in words is "forty-five million, two hundred twenty thousand, nine hundred eighty-one".