45144239 has 24 divisors (see below), whose sum is σ = 56191968. Its totient is φ = 36072960.

The previous prime is 45144217. The next prime is 45144241. The reversal of 45144239 is 93244154.

It is a de Polignac number, because none of the positive numbers 2^k-45144239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45144259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45719 + ... + 46695.

It is an arithmetic number, because the mean of its divisors is an integer number (2341332).

Almost surely, 2^45144239 is an apocalyptic number.

45144239 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

45144239 is a deficient number, since it is larger than the sum of its proper divisors (11047729).

45144239 is a wasteful number, since it uses less digits than its factorization.

45144239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055 (or 1048 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 45144239 is about 6718.9462715518. The cubic root of 45144239 is about 356.0689567849.

The spelling of 45144239 in words is "forty-five million, one hundred forty-four thousand, two hundred thirty-nine".