2506817925 has 36 divisors (see below), whose sum is σ = 4512632800. Its totient is φ = 1330227360.

The previous prime is 2506817923. The next prime is 2506817927. The reversal of 2506817925 is 5297186052.

It is an interprime number because it is at equal distance from previous prime (2506817923) and next prime (2506817927).

It is not a de Polignac number, because 2506817925 - 2¹ = 2506817923 is a prime.

It is a super-2 number, since 2×2506817925² = 12568272218202611250, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506817923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16782 + ... + 72768.

Almost surely, 2^2506817925 is an apocalyptic number.

2506817925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2506817925 is a deficient number, since it is larger than the sum of its proper divisors (2005814875).

2506817925 is a wasteful number, since it uses less digits than its factorization.

2506817925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56202 (or 56194 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 2506817925 is about 50068.1328291759. The cubic root of 2506817925 is about 1358.4414681332.

The spelling of 2506817925 in words is "two billion, five hundred six million, eight hundred seventeen thousand, nine hundred twenty-five".