25220515051 has 4 divisors (see below), whose sum is σ = 26547910600. Its totient is φ = 23893119504.

The previous prime is 25220515049. The next prime is 25220515069. The reversal of 25220515051 is 15051502252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25220515051 - 2¹ = 25220515049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25220515451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663697746 + ... + 663697783.

It is an arithmetic number, because the mean of its divisors is an integer number (6636977650).

Almost surely, 2^25220515051 is an apocalyptic number.

25220515051 is a deficient number, since it is larger than the sum of its proper divisors (1327395549).

25220515051 is a wasteful number, since it uses less digits than its factorization.

25220515051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327395548.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 25220515051 in words is "twenty-five billion, two hundred twenty million, five hundred fifteen thousand, fifty-one".