251623223325 has 36 divisors (see below), whose sum is σ = 453044836608. Its totient is φ = 133496416800.

The previous prime is 251623223323. The next prime is 251623223333. The reversal of 251623223325 is 523322326152.

251623223325 is a `hidden beast` number, since 2 + 5 + 1 + 6 + 2 + 322 + 3 + 325 = 666.

It is not a de Polignac number, because 251623223325 - 2¹ = 251623223323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251623223325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251623223323) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2884579 + ... + 2970528.

Almost surely, 2^251623223325 is an apocalyptic number.

251623223325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251623223325 is a deficient number, since it is larger than the sum of its proper divisors (201421613283).

251623223325 is a wasteful number, since it uses less digits than its factorization.

251623223325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855314 (or 5855306 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

Adding to 251623223325 its reverse (523322326152), we get a palindrome (774945549477).

The spelling of 251623223325 in words is "two hundred fifty-one billion, six hundred twenty-three million, two hundred twenty-three thousand, three hundred twenty-five".