51413110021 has 16 divisors (see below), whose sum is σ = 66608080000. Its totient is φ = 38537529408.

The previous prime is 51413109991. The next prime is 51413110057. The reversal of 51413110021 is 12001131415.

It is not a de Polignac number, because 51413110021 - 2¹³ = 51413101829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51413150021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14866146 + ... + 14869603.

It is an arithmetic number, because the mean of its divisors is an integer number (4163005000).

Almost surely, 2^51413110021 is an apocalyptic number.

It is an amenable number.

51413110021 is a deficient number, since it is larger than the sum of its proper divisors (15194969979).

51413110021 is a wasteful number, since it uses less digits than its factorization.

51413110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29735788.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 51413110021 its reverse (12001131415), we get a palindrome (63414241436).

The spelling of 51413110021 in words is "fifty-one billion, four hundred thirteen million, one hundred ten thousand, twenty-one".