25465521320215 has 16 divisors (see below), whose sum is σ = 31612995254880. Its totient is φ = 19669531674240.

The previous prime is 25465521320209. The next prime is 25465521320221. The reversal of 25465521320215 is 51202312556452.

It is an interprime number because it is at equal distance from previous prime (25465521320209) and next prime (25465521320221).

It is not a de Polignac number, because 25465521320215 - 2⁹ = 25465521319703 is a prime.

It is a super-2 number, since 2×25465521320215² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5749405 + ... + 9164425.

It is an arithmetic number, because the mean of its divisors is an integer number (1975812203430).

Almost surely, 2^{25465521320215} is an apocalyptic number.

25465521320215 is a deficient number, since it is larger than the sum of its proper divisors (6147473934665).

25465521320215 is a wasteful number, since it uses less digits than its factorization.

25465521320215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466482.

The product of its (nonzero) digits is 720000, while the sum is 43.

Adding to 25465521320215 its reverse (51202312556452), we get a palindrome (76667833876667).

The spelling of 25465521320215 in words is "twenty-five trillion, four hundred sixty-five billion, five hundred twenty-one million, three hundred twenty thousand, two hundred fifteen".