51421053641 has 4 divisors (see below), whose sum is σ = 51430372884. Its totient is φ = 51411734400.

The previous prime is 51421053631. The next prime is 51421053683. The reversal of 51421053641 is 14635012415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12731737225 + 38689316416 = 112835^2 + 196696^2 .

It is a cyclic number.

It is not a de Polignac number, because 51421053641 - 2¹⁴ = 51421037257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51421053598 and 51421053607.

It is not an unprimeable number, because it can be changed into a prime (51421053631) 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, 4651340 + ... + 4662381.

It is an arithmetic number, because the mean of its divisors is an integer number (12857593221).

Almost surely, 2^51421053641 is an apocalyptic number.

It is an amenable number.

51421053641 is a deficient number, since it is larger than the sum of its proper divisors (9319243).

51421053641 is an equidigital number, since it uses as much as digits as its factorization.

51421053641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319242.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 51421053641 in words is "fifty-one billion, four hundred twenty-one million, fifty-three thousand, six hundred forty-one".