51983731 has 2 divisors, whose sum is σ = 51983732. Its totient is φ = 51983730.

The previous prime is 51983693. The next prime is 51983741. The reversal of 51983731 is 13738915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51983731 is a prime.

It is a super-2 number, since 2×51983731² = 5404616577360722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51983741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25991865 + 25991866.

It is an arithmetic number, because the mean of its divisors is an integer number (25991866).

Almost surely, 2^51983731 is an apocalyptic number.

51983731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51983731 is an equidigital number, since it uses as much as digits as its factorization.

51983731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 51983731 is about 7209.9744104955. The cubic root of 51983731 is about 373.2121858369.

The spelling of 51983731 in words is "fifty-one million, nine hundred eighty-three thousand, seven hundred thirty-one".