51099967 has 2 divisors, whose sum is σ = 51099968. Its totient is φ = 51099966.

The previous prime is 51099947. The next prime is 51099989. The reversal of 51099967 is 76999015.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51099967 is a prime.

It is a super-2 number, since 2×51099967² = 5222413254802178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51099947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549983 + 25549984.

It is an arithmetic number, because the mean of its divisors is an integer number (25549984).

Almost surely, 2^51099967 is an apocalyptic number.

51099967 is a deficient number, since it is larger than the sum of its proper divisors (1).

51099967 is an equidigital number, since it uses as much as digits as its factorization.

51099967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 51099967 is about 7148.4240920639. The cubic root of 51099967 is about 371.0851198293.

The spelling of 51099967 in words is "fifty-one million, ninety-nine thousand, nine hundred sixty-seven".