53021979 has 32 divisors (see below), whose sum is σ = 81204480. Its totient is φ = 34171200.

The previous prime is 53021971. The next prime is 53022001. The reversal of 53021979 is 97912035.

It is not a de Polignac number, because 53021979 - 2³ = 53021971 is a prime.

It is a super-2 number, since 2×53021979² = 5622660514152882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53021971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233464 + ... + 233690.

It is an arithmetic number, because the mean of its divisors is an integer number (2537640).

Almost surely, 2^53021979 is an apocalyptic number.

53021979 is a deficient number, since it is larger than the sum of its proper divisors (28182501).

53021979 is a wasteful number, since it uses less digits than its factorization.

53021979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 53021979 is about 7281.6192567313. The cubic root of 53021979 is about 375.6804924000.

The spelling of 53021979 in words is "fifty-three million, twenty-one thousand, nine hundred seventy-nine".