53925981 has 4 divisors (see below), whose sum is σ = 71901312. Its totient is φ = 35950652.

The previous prime is 53925979. The next prime is 53926087. The reversal of 53925981 is 18952935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53925981 - 2¹ = 53925979 is a prime.

It is a super-2 number, since 2×53925981² = 5816022853624722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53925881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8987661 + ... + 8987666.

It is an arithmetic number, because the mean of its divisors is an integer number (17975328).

Almost surely, 2^53925981 is an apocalyptic number.

It is an amenable number.

53925981 is a deficient number, since it is larger than the sum of its proper divisors (17975331).

53925981 is a wasteful number, since it uses less digits than its factorization.

53925981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17975330.

The product of its digits is 97200, while the sum is 42.

The square root of 53925981 is about 7343.4311462694. The cubic root of 53925981 is about 377.8035358222.

The spelling of 53925981 in words is "fifty-three million, nine hundred twenty-five thousand, nine hundred eighty-one".