52145638 has 4 divisors (see below), whose sum is σ = 78218460. Its totient is φ = 26072818.

The previous prime is 52145591. The next prime is 52145641. The reversal of 52145638 is 83654125.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13036408 + ... + 13036411.

It is an arithmetic number, because the mean of its divisors is an integer number (19554615).

Almost surely, 2^52145638 is an apocalyptic number.

52145638 is a deficient number, since it is larger than the sum of its proper divisors (26072822).

52145638 is a wasteful number, since it uses less digits than its factorization.

52145638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26072821.

The product of its digits is 28800, while the sum is 34.

The square root of 52145638 is about 7221.1936686396. The cubic root of 52145638 is about 373.5992495021.

The spelling of 52145638 in words is "fifty-two million, one hundred forty-five thousand, six hundred thirty-eight".