51231422 has 16 divisors (see below), whose sum is σ = 84207600. Its totient is φ = 23183040.

The previous prime is 51231409. The next prime is 51231449. The reversal of 51231422 is 22413215.

It is a junction number, because it is equal to n+sod(n) for n = 51231394 and 51231403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47 + ... + 10122.

It is an arithmetic number, because the mean of its divisors is an integer number (5262975).

Almost surely, 2^51231422 is an apocalyptic number.

51231422 is a deficient number, since it is larger than the sum of its proper divisors (32976178).

51231422 is a wasteful number, since it uses less digits than its factorization.

51231422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10411.

The product of its digits is 480, while the sum is 20.

The square root of 51231422 is about 7157.6128702243. The cubic root of 51231422 is about 371.4030536569.

Adding to 51231422 its reverse (22413215), we get a palindrome (73644637).

The spelling of 51231422 in words is "fifty-one million, two hundred thirty-one thousand, four hundred twenty-two".