1231532522331 has 8 divisors (see below), whose sum is σ = 1680230418240. Its totient is φ = 801928153992.

The previous prime is 1231532522291. The next prime is 1231532522357. The reversal of 1231532522331 is 1332252351321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231532522331 - 2⁷ = 1231532522203 is a prime.

It is a super-2 number, since 2×1231532522331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231532522292 and 1231532522301.

It is not an unprimeable number, because it can be changed into a prime (1231532522131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4773381741 + ... + 4773381998.

It is an arithmetic number, because the mean of its divisors is an integer number (210028802280).

Almost surely, 2^{1231532522331} is an apocalyptic number.

1231532522331 is a deficient number, since it is larger than the sum of its proper divisors (448697895909).

1231532522331 is an equidigital number, since it uses as much as digits as its factorization.

1231532522331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9546763785.

The product of its digits is 32400, while the sum is 33.

Adding to 1231532522331 its reverse (1332252351321), we get a palindrome (2563784873652).

The spelling of 1231532522331 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, five hundred twenty-two thousand, three hundred thirty-one".