51421011140 has 24 divisors (see below), whose sum is σ = 108065553792. Its totient is φ = 20552893920.

The previous prime is 51421011127. The next prime is 51421011221. The reversal of 51421011140 is 4111012415.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942206 + ... + 995285.

It is an arithmetic number, because the mean of its divisors is an integer number (4502731408).

Almost surely, 2^51421011140 is an apocalyptic number.

It is an amenable number.

51421011140 is an abundant number, since it is smaller than the sum of its proper divisors (56644542652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51421011140 is a wasteful number, since it uses less digits than its factorization.

51421011140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938827 (or 1938825 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 51421011140 its reverse (4111012415), we get a palindrome (55532023555).

The spelling of 51421011140 in words is "fifty-one billion, four hundred twenty-one million, eleven thousand, one hundred forty".