51111225232 has 20 divisors (see below), whose sum is σ = 103333564800. Its totient is φ = 24444498848.

The previous prime is 51111225229. The next prime is 51111225241. The reversal of 51111225232 is 23252211115.

It is a happy number.

It is a super-2 number, since 2×51111225232² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51111225197 and 51111225206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69444232 + ... + 69444967.

It is an arithmetic number, because the mean of its divisors is an integer number (5166678240).

Almost surely, 2^51111225232 is an apocalyptic number.

It is an amenable number.

51111225232 is an abundant number, since it is smaller than the sum of its proper divisors (52222339568).

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

51111225232 is a wasteful number, since it uses less digits than its factorization.

51111225232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138889230 (or 138889224 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

Adding to 51111225232 its reverse (23252211115), we get a palindrome (74363436347).

The spelling of 51111225232 in words is "fifty-one billion, one hundred eleven million, two hundred twenty-five thousand, two hundred thirty-two".