25151222501 has 4 divisors (see below), whose sum is σ = 25170827232. Its totient is φ = 25131617772.

The previous prime is 25151222489. The next prime is 25151222519. The reversal of 25151222501 is 10522215152.

It is a happy number.

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 25151222501 - 2¹⁴ = 25151206117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25151222561) 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, 9800441 + ... + 9803006.

It is an arithmetic number, because the mean of its divisors is an integer number (6292706808).

Almost surely, 2^25151222501 is an apocalyptic number.

It is an amenable number.

25151222501 is a deficient number, since it is larger than the sum of its proper divisors (19604731).

25151222501 is a wasteful number, since it uses less digits than its factorization.

25151222501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19604730.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 25151222501 its reverse (10522215152), we get a palindrome (35673437653).

The spelling of 25151222501 in words is "twenty-five billion, one hundred fifty-one million, two hundred twenty-two thousand, five hundred one".