51323567 has 2 divisors, whose sum is σ = 51323568. Its totient is φ = 51323566.

The previous prime is 51323563. The next prime is 51323593. The reversal of 51323567 is 76532315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51323567 - 2² = 51323563 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51323563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25661783 + 25661784.

It is an arithmetic number, because the mean of its divisors is an integer number (25661784).

Almost surely, 2^51323567 is an apocalyptic number.

51323567 is a deficient number, since it is larger than the sum of its proper divisors (1).

51323567 is an equidigital number, since it uses as much as digits as its factorization.

51323567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 32.

The square root of 51323567 is about 7164.0468312260. The cubic root of 51323567 is about 371.6255892005.

The spelling of 51323567 in words is "fifty-one million, three hundred twenty-three thousand, five hundred sixty-seven".