51145867 has 2 divisors, whose sum is σ = 51145868. Its totient is φ = 51145866.

The previous prime is 51145841. The next prime is 51145903. The reversal of 51145867 is 76854115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51145867 - 2¹⁵ = 51113099 is a prime.

It is a super-2 number, since 2×51145867² = 5231799422363378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51145807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25572933 + 25572934.

It is an arithmetic number, because the mean of its divisors is an integer number (25572934).

Almost surely, 2^51145867 is an apocalyptic number.

51145867 is a deficient number, since it is larger than the sum of its proper divisors (1).

51145867 is an equidigital number, since it uses as much as digits as its factorization.

51145867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 51145867 is about 7151.6338692637. The cubic root of 51145867 is about 371.1961943283.

The spelling of 51145867 in words is "fifty-one million, one hundred forty-five thousand, eight hundred sixty-seven".