51490230947 has 2 divisors, whose sum is σ = 51490230948. Its totient is φ = 51490230946.

The previous prime is 51490230943. The next prime is 51490230997. The reversal of 51490230947 is 74903209415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51490230947 - 2² = 51490230943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51490230898 and 51490230907.

It is not a weakly prime, because it can be changed into another prime (51490230943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25745115473 + 25745115474.

It is an arithmetic number, because the mean of its divisors is an integer number (25745115474).

Almost surely, 2^51490230947 is an apocalyptic number.

51490230947 is a deficient number, since it is larger than the sum of its proper divisors (1).

51490230947 is an equidigital number, since it uses as much as digits as its factorization.

51490230947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 51490230947 in words is "fifty-one billion, four hundred ninety million, two hundred thirty thousand, nine hundred forty-seven".