131011422025 has 27 divisors (see below), whose sum is σ = 178592457589. Its totient is φ = 95266556000.

The previous prime is 131011422023. The next prime is 131011422037. The reversal of 131011422025 is 520224110131.

The square root of 131011422025 is 361955.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 21413346889 + 109598075136 = 146333^2 + 331056^2 .

It is not a de Polignac number, because 131011422025 - 2¹ = 131011422023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131011421987 and 131011422005.

It is not an unprimeable number, because it can be changed into a prime (131011422023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19904235 + ... + 19910815.

Almost surely, 2^131011422025 is an apocalyptic number.

131011422025 is the 361955-th square number.

131011422025 is the 180978-th centered octagonal number.

It is an amenable number.

131011422025 is a deficient number, since it is larger than the sum of its proper divisors (47581035564).

131011422025 is an frugal number, since it uses more digits than its factorization.

131011422025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13194 (or 6597 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 131011422025 its reverse (520224110131), we get a palindrome (651235532156).

The spelling of 131011422025 in words is "one hundred thirty-one billion, eleven million, four hundred twenty-two thousand, twenty-five".