53861531 has 2 divisors, whose sum is σ = 53861532. Its totient is φ = 53861530.

The previous prime is 53861503. The next prime is 53861537. The reversal of 53861531 is 13516835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53861531 - 2¹⁰ = 53860507 is a prime.

It is a super-2 number, since 2×53861531² = 5802129043327922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53861537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26930765 + 26930766.

It is an arithmetic number, because the mean of its divisors is an integer number (26930766).

Almost surely, 2^53861531 is an apocalyptic number.

53861531 is a deficient number, since it is larger than the sum of its proper divisors (1).

53861531 is an equidigital number, since it uses as much as digits as its factorization.

53861531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 53861531 is about 7339.0415586778. The cubic root of 53861531 is about 377.6529643392.

The spelling of 53861531 in words is "fifty-three million, eight hundred sixty-one thousand, five hundred thirty-one".