2122551231531 has 16 divisors (see below), whose sum is σ = 2833860556800. Its totient is φ = 1413139303808.

The previous prime is 2122551231487. The next prime is 2122551231551. The reversal of 2122551231531 is 1351321552212.

It is a cyclic number.

It is not a de Polignac number, because 2122551231531 - 2⁶ = 2122551231467 is a prime.

It is a super-2 number, since 2×2122551231531² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2122551231492 and 2122551231501.

It is not an unprimeable number, because it can be changed into a prime (2122551231551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6572515 + ... + 6887891.

It is an arithmetic number, because the mean of its divisors is an integer number (177116284800).

Almost surely, 2^{2122551231531} is an apocalyptic number.

2122551231531 is a deficient number, since it is larger than the sum of its proper divisors (711309325269).

2122551231531 is a wasteful number, since it uses less digits than its factorization.

2122551231531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318378.

The product of its digits is 18000, while the sum is 33.

Adding to 2122551231531 its reverse (1351321552212), we get a palindrome (3473872783743).

The spelling of 2122551231531 in words is "two trillion, one hundred twenty-two billion, five hundred fifty-one million, two hundred thirty-one thousand, five hundred thirty-one".