51231322 has 4 divisors (see below), whose sum is σ = 76846986. Its totient is φ = 25615660.

The previous prime is 51231289. The next prime is 51231329. The reversal of 51231322 is 22313215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22313215 = 5 ⋅4462643.

It can be written as a sum of positive squares in only one way, i.e., 41873841 + 9357481 = 6471^2 + 3059^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51231322.

It is not an unprimeable number, because it can be changed into a prime (51231329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12807829 + ... + 12807832.

Almost surely, 2^51231322 is an apocalyptic number.

51231322 is a deficient number, since it is larger than the sum of its proper divisors (25615664).

51231322 is a wasteful number, since it uses less digits than its factorization.

51231322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25615663.

The product of its digits is 360, while the sum is 19.

The square root of 51231322 is about 7157.6058846517. The cubic root of 51231322 is about 371.4028120062.

Adding to 51231322 its reverse (22313215), we get a palindrome (73544537).

The spelling of 51231322 in words is "fifty-one million, two hundred thirty-one thousand, three hundred twenty-two".