25215098513 has 32 divisors (see below), whose sum is σ = 31213382400. Its totient is φ = 20078530560.

The previous prime is 25215098473. The next prime is 25215098527. The reversal of 25215098513 is 31589051252.

It is a happy number.

It is not a de Polignac number, because 25215098513 - 2⁶ = 25215098449 is a prime.

It is a super-2 number, since 2×25215098513² (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 (25215098213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79913 + ... + 238361.

It is an arithmetic number, because the mean of its divisors is an integer number (975418200).

Almost surely, 2^25215098513 is an apocalyptic number.

25215098513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25215098513 is a deficient number, since it is larger than the sum of its proper divisors (5998283887).

25215098513 is a wasteful number, since it uses less digits than its factorization.

25215098513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158537.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 25215098513 in words is "twenty-five billion, two hundred fifteen million, ninety-eight thousand, five hundred thirteen".