53309138 has 4 divisors (see below), whose sum is σ = 79963710. Its totient is φ = 26654568.

The previous prime is 53309129. The next prime is 53309171. The reversal of 53309138 is 83190335.

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., 52809289 + 499849 = 7267^2 + 707^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13327283 + ... + 13327286.

Almost surely, 2^53309138 is an apocalyptic number.

53309138 is a deficient number, since it is larger than the sum of its proper divisors (26654572).

53309138 is a wasteful number, since it uses less digits than its factorization.

53309138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26654571.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 53309138 is about 7301.3107042503. The cubic root of 53309138 is about 376.3574812415.

The spelling of 53309138 in words is "fifty-three million, three hundred nine thousand, one hundred thirty-eight".