51142511511 has 160 divisors (see below), whose sum is σ = 99799096320. Its totient is φ = 25361081856.

The previous prime is 51142511383. The next prime is 51142511531. The reversal of 51142511511 is 11511524115.

51142511511 is a `hidden beast` number, since 5 + 1 + 142 + 5 + 1 + 1 + 511 = 666.

It is not a de Polignac number, because 51142511511 - 2⁷ = 51142511383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51142511531) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9999891 + ... + 10005003.

It is an arithmetic number, because the mean of its divisors is an integer number (623744352).

Almost surely, 2^51142511511 is an apocalyptic number.

51142511511 is a deficient number, since it is larger than the sum of its proper divisors (48656584809).

51142511511 is a wasteful number, since it uses less digits than its factorization.

51142511511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227 (or 5218 counting only the distinct ones).

The product of its digits is 1000, while the sum is 27.

The spelling of 51142511511 in words is "fifty-one billion, one hundred forty-two million, five hundred eleven thousand, five hundred eleven".