53168138 has 4 divisors (see below), whose sum is σ = 79752210. Its totient is φ = 26584068.

The previous prime is 53168113. The next prime is 53168161. The reversal of 53168138 is 83186135.

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

It can be written as a sum of positive squares in only one way, i.e., 33605209 + 19562929 = 5797^2 + 4423^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53168098 and 53168107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13292033 + ... + 13292036.

Almost surely, 2^53168138 is an apocalyptic number.

53168138 is a deficient number, since it is larger than the sum of its proper divisors (26584072).

53168138 is a wasteful number, since it uses less digits than its factorization.

53168138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26584071.

The product of its digits is 17280, while the sum is 35.

The square root of 53168138 is about 7291.6485104536. The cubic root of 53168138 is about 376.0253727031.

The spelling of 53168138 in words is "fifty-three million, one hundred sixty-eight thousand, one hundred thirty-eight".