45138550 has 12 divisors (see below), whose sum is σ = 83957796. Its totient is φ = 18055400.

The previous prime is 45138497. The next prime is 45138551. The reversal of 45138550 is 5583154.

It is a super-2 number, since 2×45138550² = 4074977392205000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45138551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 451336 + ... + 451435.

It is an arithmetic number, because the mean of its divisors is an integer number (6996483).

Almost surely, 2^45138550 is an apocalyptic number.

45138550 is a deficient number, since it is larger than the sum of its proper divisors (38819246).

45138550 is a wasteful number, since it uses less digits than its factorization.

45138550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902783 (or 902778 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 45138550 is about 6718.5229031388. The cubic root of 45138550 is about 356.0539990891.

The spelling of 45138550 in words is "forty-five million, one hundred thirty-eight thousand, five hundred fifty".