51403207 has 2 divisors, whose sum is σ = 51403208. Its totient is φ = 51403206.

The previous prime is 51403181. The next prime is 51403273. The reversal of 51403207 is 70230415.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51403207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51403277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25701603 + 25701604.

It is an arithmetic number, because the mean of its divisors is an integer number (25701604).

Almost surely, 2^51403207 is an apocalyptic number.

51403207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51403207 is an equidigital number, since it uses as much as digits as its factorization.

51403207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 51403207 is about 7169.6029876137. The cubic root of 51403207 is about 371.8177099514.

The spelling of 51403207 in words is "fifty-one million, four hundred three thousand, two hundred seven".