25223137 has 4 divisors (see below), whose sum is σ = 25277616. Its totient is φ = 25168660.

The previous prime is 25223129. The next prime is 25223141. The reversal of 25223137 is 73132252.

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 25223137 - 2³ = 25223129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25223117) 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 3 ways as a sum of consecutive naturals, for example, 26539 + ... + 27472.

It is an arithmetic number, because the mean of its divisors is an integer number (6319404).

Almost surely, 2^25223137 is an apocalyptic number.

It is an amenable number.

25223137 is a deficient number, since it is larger than the sum of its proper divisors (54479).

25223137 is an equidigital number, since it uses as much as digits as its factorization.

25223137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54478.

The product of its digits is 2520, while the sum is 25.

The square root of 25223137 is about 5022.2641308478. The cubic root of 25223137 is about 293.2691404239.

Adding to 25223137 its reverse (73132252), we get a palindrome (98355389).

The spelling of 25223137 in words is "twenty-five million, two hundred twenty-three thousand, one hundred thirty-seven".