25533397 has 4 divisors (see below), whose sum is σ = 26877280. Its totient is φ = 24189516.

The previous prime is 25533377. The next prime is 25533401. The reversal of 25533397 is 79333552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25533397 - 2¹¹ = 25531349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25533317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671913 + ... + 671950.

It is an arithmetic number, because the mean of its divisors is an integer number (6719320).

Almost surely, 2^25533397 is an apocalyptic number.

It is an amenable number.

25533397 is a deficient number, since it is larger than the sum of its proper divisors (1343883).

25533397 is a wasteful number, since it uses less digits than its factorization.

25533397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343882.

The product of its digits is 85050, while the sum is 37.

The square root of 25533397 is about 5053.0581829225. The cubic root of 25533397 is about 294.4667067170.

The spelling of 25533397 in words is "twenty-five million, five hundred thirty-three thousand, three hundred ninety-seven".