51979351 has 2 divisors, whose sum is σ = 51979352. Its totient is φ = 51979350.

The previous prime is 51979297. The next prime is 51979357. The reversal of 51979351 is 15397915.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51979351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51979357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25989675 + 25989676.

It is an arithmetic number, because the mean of its divisors is an integer number (25989676).

Almost surely, 2^51979351 is an apocalyptic number.

51979351 is a deficient number, since it is larger than the sum of its proper divisors (1).

51979351 is an equidigital number, since it uses as much as digits as its factorization.

51979351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42525, while the sum is 40.

The square root of 51979351 is about 7209.6706582201. The cubic root of 51979351 is about 373.2017036132.

The spelling of 51979351 in words is "fifty-one million, nine hundred seventy-nine thousand, three hundred fifty-one".