51773431 has 2 divisors, whose sum is σ = 51773432. Its totient is φ = 51773430.

The previous prime is 51773387. The next prime is 51773443. The reversal of 51773431 is 13437715.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51773431 is a prime.

It is a super-2 number, since 2×51773431² = 5360976315023522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51773393 and 51773402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51771431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25886715 + 25886716.

It is an arithmetic number, because the mean of its divisors is an integer number (25886716).

Almost surely, 2^51773431 is an apocalyptic number.

51773431 is a deficient number, since it is larger than the sum of its proper divisors (1).

51773431 is an equidigital number, since it uses as much as digits as its factorization.

51773431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 31.

The square root of 51773431 is about 7195.3756677466. The cubic root of 51773431 is about 372.7082294473.

The spelling of 51773431 in words is "fifty-one million, seven hundred seventy-three thousand, four hundred thirty-one".