45388215 has 32 divisors (see below), whose sum is σ = 85440960. Its totient is φ = 22781952.

The previous prime is 45388157. The next prime is 45388243. The reversal of 45388215 is 51288354.

It is a happy number.

It is not a de Polignac number, because 45388215 - 2⁸ = 45387959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45388215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7594 + ... + 12183.

It is an arithmetic number, because the mean of its divisors is an integer number (2670030).

Almost surely, 2^45388215 is an apocalyptic number.

45388215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

45388215 is a deficient number, since it is larger than the sum of its proper divisors (40052745).

45388215 is a wasteful number, since it uses less digits than its factorization.

45388215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808 (or 19802 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 45388215 is about 6737.0776305458. The cubic root of 45388215 is about 356.7092470587.

The spelling of 45388215 in words is "forty-five million, three hundred eighty-eight thousand, two hundred fifteen".