51542237951 has 2 divisors, whose sum is σ = 51542237952. Its totient is φ = 51542237950.

The previous prime is 51542237917. The next prime is 51542237953. The reversal of 51542237951 is 15973224515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51542237951 - 2²⁶ = 51475129087 is a prime.

It is a Sophie Germain prime.

Together with 51542237953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51542237953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25771118975 + 25771118976.

It is an arithmetic number, because the mean of its divisors is an integer number (25771118976).

Almost surely, 2^51542237951 is an apocalyptic number.

51542237951 is a deficient number, since it is larger than the sum of its proper divisors (1).

51542237951 is an equidigital number, since it uses as much as digits as its factorization.

51542237951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 44.

The spelling of 51542237951 in words is "fifty-one billion, five hundred forty-two million, two hundred thirty-seven thousand, nine hundred fifty-one".