1625533725 has 24 divisors (see below), whose sum is σ = 2690368480. Its totient is φ = 866041920.

The previous prime is 1625533709. The next prime is 1625533729. The reversal of 1625533725 is 5273355261.

1625533725 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1625533725 - 2⁴ = 1625533709 is a prime.

It is a super-2 number, since 2×1625533725² = 5284719782224751250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625533729) 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, 63906 + ... + 85644.

Almost surely, 2^1625533725 is an apocalyptic number.

1625533725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625533725 is a deficient number, since it is larger than the sum of its proper divisors (1064834755).

1625533725 is a wasteful number, since it uses less digits than its factorization.

1625533725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22749 (or 22744 counting only the distinct ones).

The product of its digits is 189000, while the sum is 39.

The square root of 1625533725 is about 40317.9082418719. The cubic root of 1625533725 is about 1175.7960442435.

Adding to 1625533725 its reverse (5273355261), we get a palindrome (6898888986).

The spelling of 1625533725 in words is "one billion, six hundred twenty-five million, five hundred thirty-three thousand, seven hundred twenty-five".