53138474 has 4 divisors (see below), whose sum is σ = 79707714. Its totient is φ = 26569236.

The previous prime is 53138471. The next prime is 53138479. The reversal of 53138474 is 47483135.

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., 42994249 + 10144225 = 6557^2 + 3185^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53138471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13284617 + ... + 13284620.

Almost surely, 2^53138474 is an apocalyptic number.

53138474 is a deficient number, since it is larger than the sum of its proper divisors (26569240).

53138474 is a wasteful number, since it uses less digits than its factorization.

53138474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26569239.

The product of its digits is 40320, while the sum is 35.

The square root of 53138474 is about 7289.6141187308. The cubic root of 53138474 is about 375.9554279820.

The spelling of 53138474 in words is "fifty-three million, one hundred thirty-eight thousand, four hundred seventy-four".