51235053421 has 8 divisors (see below), whose sum is σ = 53958414080. Its totient is φ = 48514370688.

The previous prime is 51235053379. The next prime is 51235053427. The reversal of 51235053421 is 12435053215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51235053421 - 2¹³ = 51235045229 is a prime.

It is a super-5 number, since 5×51235053421⁵ (a number of 55 digits) contains 55555 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 (51235053427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630141 + ... + 706786.

It is an arithmetic number, because the mean of its divisors is an integer number (6744801760).

Almost surely, 2^51235053421 is an apocalyptic number.

It is an amenable number.

51235053421 is a deficient number, since it is larger than the sum of its proper divisors (2723360659).

51235053421 is a wasteful number, since it uses less digits than its factorization.

51235053421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338963.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 51235053421 in words is "fifty-one billion, two hundred thirty-five million, fifty-three thousand, four hundred twenty-one".