25009533 has 48 divisors (see below), whose sum is σ = 41408640. Its totient is φ = 14864256.

The previous prime is 25009511. The next prime is 25009541. The reversal of 25009533 is 33590052.

It is not a de Polignac number, because 25009533 - 2⁶ = 25009469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25009497 and 25009506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25009553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242760 + ... + 242862.

It is an arithmetic number, because the mean of its divisors is an integer number (862680).

Almost surely, 2^25009533 is an apocalyptic number.

25009533 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25009533 is a deficient number, since it is larger than the sum of its proper divisors (16399107).

25009533 is a wasteful number, since it uses less digits than its factorization.

25009533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The square root of 25009533 is about 5000.9532091392. The cubic root of 25009533 is about 292.4389353130.

Adding to 25009533 its reverse (33590052), we get a palindrome (58599585).

The spelling of 25009533 in words is "twenty-five million, nine thousand, five hundred thirty-three".