45220521 has 8 divisors (see below), whose sum is σ = 60328800. Its totient is φ = 30129632.

The previous prime is 45220519. The next prime is 45220523. The reversal of 45220521 is 12502254.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (45220519) and next prime (45220523).

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 45220521 - 2¹ = 45220519 is a prime.

It is a super-2 number, since 2×45220521² = 4089791039022882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45220523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4030 + ... + 10328.

It is an arithmetic number, because the mean of its divisors is an integer number (7541100).

Almost surely, 2^45220521 is an apocalyptic number.

It is an amenable number.

45220521 is a deficient number, since it is larger than the sum of its proper divisors (15108279).

45220521 is a wasteful number, since it uses less digits than its factorization.

45220521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8695.

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

The square root of 45220521 is about 6724.6205097388. The cubic root of 45220521 is about 356.2693985128.

Adding to 45220521 its reverse (12502254), we get a palindrome (57722775).

The spelling of 45220521 in words is "forty-five million, two hundred twenty thousand, five hundred twenty-one".