1631725525 has 6 divisors (see below), whose sum is σ = 2023339682. Its totient is φ = 1305380400.

The previous prime is 1631725489. The next prime is 1631725549. The reversal of 1631725525 is 5255271361.

It can be written as a sum of positive squares in 3 ways, for example, as 276823044 + 1354902481 = 16638^2 + 36809^2 .

It is not a de Polignac number, because 1631725525 - 2¹⁵ = 1631692757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32634486 + ... + 32634535.

Almost surely, 2^1631725525 is an apocalyptic number.

It is an amenable number.

1631725525 is a deficient number, since it is larger than the sum of its proper divisors (391614157).

1631725525 is an equidigital number, since it uses as much as digits as its factorization.

1631725525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65269031 (or 65269026 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The square root of 1631725525 is about 40394.6224762653. The cubic root of 1631725525 is about 1177.2870560033.

Adding to 1631725525 its reverse (5255271361), we get a palindrome (6886996886).

The spelling of 1631725525 in words is "one billion, six hundred thirty-one million, seven hundred twenty-five thousand, five hundred twenty-five".