45515021 has 8 divisors (see below), whose sum is σ = 46173600. Its totient is φ = 44861040.

The previous prime is 45515011. The next prime is 45515023. The reversal of 45515021 is 12051554.

It is a happy number.

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 45515021 - 2¹⁰ = 45513997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45515023) 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, 22010 + ... + 23988.

It is an arithmetic number, because the mean of its divisors is an integer number (5771700).

Almost surely, 2^45515021 is an apocalyptic number.

It is an amenable number.

45515021 is a deficient number, since it is larger than the sum of its proper divisors (658579).

45515021 is a wasteful number, since it uses less digits than its factorization.

45515021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 45515021 is about 6746.4821203350. The cubic root of 45515021 is about 357.0411306695.

Adding to 45515021 its reverse (12051554), we get a palindrome (57566575).

The spelling of 45515021 in words is "forty-five million, five hundred fifteen thousand, twenty-one".