25220515105 has 16 divisors (see below), whose sum is σ = 31683383424. Its totient is φ = 19236286080.

The previous prime is 25220515079. The next prime is 25220515109. The reversal of 25220515105 is 50151502252.

It is not a de Polignac number, because 25220515105 - 2¹⁵ = 25220482337 is a prime.

It is a super-2 number, since 2×25220515105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25220515109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321876 + ... + 392485.

It is an arithmetic number, because the mean of its divisors is an integer number (1980211464).

Almost surely, 2^25220515105 is an apocalyptic number.

It is an amenable number.

25220515105 is a deficient number, since it is larger than the sum of its proper divisors (6462868319).

25220515105 is a wasteful number, since it uses less digits than its factorization.

25220515105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714696.

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

The spelling of 25220515105 in words is "twenty-five billion, two hundred twenty million, five hundred fifteen thousand, one hundred five".