53621938 has 4 divisors (see below), whose sum is σ = 80432910. Its totient is φ = 26810968.

The previous prime is 53621929. The next prime is 53621959. The reversal of 53621938 is 83912635.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83912635 = 5 ⋅16782527.

It can be written as a sum of positive squares in only one way, i.e., 48066489 + 5555449 = 6933^2 + 2357^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53621897 and 53621906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13405483 + ... + 13405486.

Almost surely, 2^53621938 is an apocalyptic number.

53621938 is a deficient number, since it is larger than the sum of its proper divisors (26810972).

53621938 is a wasteful number, since it uses less digits than its factorization.

53621938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26810971.

The product of its digits is 38880, while the sum is 37.

The square root of 53621938 is about 7322.7001850410. The cubic root of 53621938 is about 377.0921589854.

The spelling of 53621938 in words is "fifty-three million, six hundred twenty-one thousand, nine hundred thirty-eight".