51501197323 has 4 divisors (see below), whose sum is σ = 51501907048. Its totient is φ = 51500487600.

The previous prime is 51501197317. The next prime is 51501197347. The reversal of 51501197323 is 32379110515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51501197323 - 2⁹ = 51501196811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51501197623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231786 + ... + 395887.

It is an arithmetic number, because the mean of its divisors is an integer number (12875476762).

Almost surely, 2^51501197323 is an apocalyptic number.

51501197323 is a deficient number, since it is larger than the sum of its proper divisors (709725).

51501197323 is an equidigital number, since it uses as much as digits as its factorization.

51501197323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709724.

The product of its (nonzero) digits is 28350, while the sum is 37.

The spelling of 51501197323 in words is "fifty-one billion, five hundred one million, one hundred ninety-seven thousand, three hundred twenty-three".