51395951 has 2 divisors, whose sum is σ = 51395952. Its totient is φ = 51395950.

The previous prime is 51395933. The next prime is 51395983. The reversal of 51395951 is 15959315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51395951 - 2¹⁴ = 51379567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51395051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25697975 + 25697976.

It is an arithmetic number, because the mean of its divisors is an integer number (25697976).

Almost surely, 2^51395951 is an apocalyptic number.

51395951 is a deficient number, since it is larger than the sum of its proper divisors (1).

51395951 is an equidigital number, since it uses as much as digits as its factorization.

51395951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30375, while the sum is 38.

The square root of 51395951 is about 7169.0969445252. The cubic root of 51395951 is about 371.8002140505.

The spelling of 51395951 in words is "fifty-one million, three hundred ninety-five thousand, nine hundred fifty-one".