51235111142 has 4 divisors (see below), whose sum is σ = 76852666716. Its totient is φ = 25617555570.

The previous prime is 51235111079. The next prime is 51235111177. The reversal of 51235111142 is 24111153215.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×51235111142² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12808777784 + ... + 12808777787.

It is an arithmetic number, because the mean of its divisors is an integer number (19213166679).

Almost surely, 2^51235111142 is an apocalyptic number.

51235111142 is a deficient number, since it is larger than the sum of its proper divisors (25617555574).

51235111142 is a wasteful number, since it uses less digits than its factorization.

51235111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25617555573.

The product of its digits is 1200, while the sum is 26.

Adding to 51235111142 its reverse (24111153215), we get a palindrome (75346264357).

The spelling of 51235111142 in words is "fifty-one billion, two hundred thirty-five million, one hundred eleven thousand, one hundred forty-two".