51323120501 has 4 divisors (see below), whose sum is σ = 51329265792. Its totient is φ = 51316975212.

The previous prime is 51323120419. The next prime is 51323120531. The reversal of 51323120501 is 10502132315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51323120501 - 2¹⁴ = 51323104117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51323120531) 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, 3060101 + ... + 3076826.

It is an arithmetic number, because the mean of its divisors is an integer number (12832316448).

Almost surely, 2^51323120501 is an apocalyptic number.

It is an amenable number.

51323120501 is a deficient number, since it is larger than the sum of its proper divisors (6145291).

51323120501 is an equidigital number, since it uses as much as digits as its factorization.

51323120501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145290.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 51323120501 its reverse (10502132315), we get a palindrome (61825252816).

The spelling of 51323120501 in words is "fifty-one billion, three hundred twenty-three million, one hundred twenty thousand, five hundred one".