1231532514231 has 32 divisors (see below), whose sum is σ = 1739124172800. Its totient is φ = 773015798880.

The previous prime is 1231532514221. The next prime is 1231532514281. The reversal of 1231532514231 is 1324152351321.

It is a happy number.

It is not a de Polignac number, because 1231532514231 - 2¹⁰ = 1231532513207 is a prime.

It is a super-2 number, since 2×1231532514231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231532514192 and 1231532514201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231532514221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97649116 + ... + 97661726.

It is an arithmetic number, because the mean of its divisors is an integer number (54347630400).

Almost surely, 2^{1231532514231} is an apocalyptic number.

1231532514231 is a deficient number, since it is larger than the sum of its proper divisors (507591658569).

1231532514231 is a wasteful number, since it uses less digits than its factorization.

1231532514231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23059.

The product of its digits is 21600, while the sum is 33.

Adding to 1231532514231 its reverse (1324152351321), we get a palindrome (2555684865552).

The spelling of 1231532514231 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, five hundred fourteen thousand, two hundred thirty-one".