51148507 has 2 divisors, whose sum is σ = 51148508. Its totient is φ = 51148506.

The previous prime is 51148499. The next prime is 51148519. The reversal of 51148507 is 70584115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51148507 - 2³ = 51148499 is a prime.

It is not a weakly prime, because it can be changed into another prime (51148807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25574253 + 25574254.

It is an arithmetic number, because the mean of its divisors is an integer number (25574254).

Almost surely, 2^51148507 is an apocalyptic number.

51148507 is a deficient number, since it is larger than the sum of its proper divisors (1).

51148507 is an equidigital number, since it uses as much as digits as its factorization.

51148507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 51148507 is about 7151.8184400892. The cubic root of 51148507 is about 371.2025809055.

The spelling of 51148507 in words is "fifty-one million, one hundred forty-eight thousand, five hundred seven".