53993531 has 2 divisors, whose sum is σ = 53993532. Its totient is φ = 53993530.

The previous prime is 53993521. The next prime is 53993561. The reversal of 53993531 is 13539935.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53993531 - 2¹⁰ = 53992507 is a prime.

It is a super-2 number, since 2×53993531² = 5830602779695922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53993521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26996765 + 26996766.

It is an arithmetic number, because the mean of its divisors is an integer number (26996766).

Almost surely, 2^53993531 is an apocalyptic number.

53993531 is a deficient number, since it is larger than the sum of its proper divisors (1).

53993531 is an equidigital number, since it uses as much as digits as its factorization.

53993531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54675, while the sum is 38.

The square root of 53993531 is about 7348.0290554679. The cubic root of 53993531 is about 377.9612209782.

The spelling of 53993531 in words is "fifty-three million, nine hundred ninety-three thousand, five hundred thirty-one".