51542122234 has 4 divisors (see below), whose sum is σ = 77313183354. Its totient is φ = 25771061116.

The previous prime is 51542122223. The next prime is 51542122267. The reversal of 51542122234 is 43222124515.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 42126331009 + 9415791225 = 205247^2 + 97035^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51542122196 and 51542122205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12885530557 + ... + 12885530560.

Almost surely, 2^51542122234 is an apocalyptic number.

51542122234 is a deficient number, since it is larger than the sum of its proper divisors (25771061120).

51542122234 is a wasteful number, since it uses less digits than its factorization.

51542122234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25771061119.

The product of its digits is 19200, while the sum is 31.

Adding to 51542122234 its reverse (43222124515), we get a palindrome (94764246749).

The spelling of 51542122234 in words is "fifty-one billion, five hundred forty-two million, one hundred twenty-two thousand, two hundred thirty-four".