51342052312621 has 32 divisors (see below), whose sum is σ = 63816499888128. Its totient is φ = 40340732857920.

The previous prime is 51342052312613. The next prime is 51342052312687. The reversal of 51342052312621 is 12621325024315.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51342052312621 - 2³ = 51342052312613 is a prime.

It is a super-2 number, since 2×51342052312621² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51342052312021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49422466 + ... + 50450611.

It is an arithmetic number, because the mean of its divisors is an integer number (1994265621504).

Almost surely, 2^{51342052312621} is an apocalyptic number.

It is an amenable number.

51342052312621 is a deficient number, since it is larger than the sum of its proper divisors (12474447575507).

51342052312621 is a wasteful number, since it uses less digits than its factorization.

51342052312621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99873241.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 51342052312621 its reverse (12621325024315), we get a palindrome (63963377336936).

The spelling of 51342052312621 in words is "fifty-one trillion, three hundred forty-two billion, fifty-two million, three hundred twelve thousand, six hundred twenty-one".