1231532500525 has 24 divisors (see below), whose sum is σ = 1539010157760. Its totient is φ = 977549362560.

The previous prime is 1231532500477. The next prime is 1231532500529. The reversal of 1231532500525 is 5250052351321.

It is not a de Polignac number, because 1231532500525 - 2⁷ = 1231532500397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231532500529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6895402 + ... + 7071748.

It is an arithmetic number, because the mean of its divisors is an integer number (64125423240).

Almost surely, 2^{1231532500525} is an apocalyptic number.

It is an amenable number.

1231532500525 is a deficient number, since it is larger than the sum of its proper divisors (307477657235).

1231532500525 is a wasteful number, since it uses less digits than its factorization.

1231532500525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178533 (or 178528 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 1231532500525 its reverse (5250052351321), we get a palindrome (6481584851846).

The spelling of 1231532500525 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, five hundred thousand, five hundred twenty-five".