425540952225 has 81 divisors (see below), whose sum is σ = 769855997547. Its totient is φ = 224695486080.

The previous prime is 425540952217. The next prime is 425540952227. The reversal of 425540952225 is 522259045524.

The square root of 425540952225 is 652335.

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

425540952225 is a `hidden beast` number, since 4 + 2 + 554 + 0 + 95 + 2 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 423281661201 + 2259291024 = 650601^2 + 47532^2 .

It is not a de Polignac number, because 425540952225 - 2³ = 425540952217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (425540952227) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1536248787 + ... + 1536249063.

Almost surely, 2^425540952225 is an apocalyptic number.

425540952225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

425540952225 is the 652335-th square number.

425540952225 is the 326168-th centered octagonal number.

It is an amenable number.

425540952225 is a deficient number, since it is larger than the sum of its proper divisors (344315045322).

425540952225 is an equidigital number, since it uses as much as digits as its factorization.

425540952225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

Adding to 425540952225 its reverse (522259045524), we get a palindrome (947799997749).

The spelling of 425540952225 in words is "four hundred twenty-five billion, five hundred forty million, nine hundred fifty-two thousand, two hundred twenty-five".