51001082421 has 8 divisors (see below), whose sum is σ = 69839320224. Its totient is φ = 33081783120.

The previous prime is 51001082393. The next prime is 51001082449. The reversal of 51001082421 is 12428010015.

It is an interprime number because it is at equal distance from previous prime (51001082393) and next prime (51001082449).

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

It is not a de Polignac number, because 51001082421 - 2⁵ = 51001082389 is a prime.

It is a super-2 number, since 2×51001082421² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51001082391 and 51001082400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001082221) 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, 229734495 + ... + 229734716.

It is an arithmetic number, because the mean of its divisors is an integer number (8729915028).

Almost surely, 2^51001082421 is an apocalyptic number.

It is an amenable number.

51001082421 is a deficient number, since it is larger than the sum of its proper divisors (18838237803).

51001082421 is a wasteful number, since it uses less digits than its factorization.

51001082421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459469251.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 51001082421 its reverse (12428010015), we get a palindrome (63429092436).

The spelling of 51001082421 in words is "fifty-one billion, one million, eighty-two thousand, four hundred twenty-one".