51102420131 has 8 divisors (see below), whose sum is σ = 59827223904. Its totient is φ = 42733730880.

The previous prime is 51102420113. The next prime is 51102420137. The reversal of 51102420131 is 13102420115.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51102420131 is a prime.

It is a super-2 number, since 2×51102420131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51102420137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89028320 + ... + 89028893.

It is an arithmetic number, because the mean of its divisors is an integer number (7478402988).

Almost surely, 2^51102420131 is an apocalyptic number.

51102420131 is a deficient number, since it is larger than the sum of its proper divisors (8724803773).

51102420131 is a wasteful number, since it uses less digits than its factorization.

51102420131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178057261.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 51102420131 its reverse (13102420115), we get a palindrome (64204840246).

The spelling of 51102420131 in words is "fifty-one billion, one hundred two million, four hundred twenty thousand, one hundred thirty-one".