25512013103 has 16 divisors (see below), whose sum is σ = 27310680576. Its totient is φ = 23778284640.

The previous prime is 25512013099. The next prime is 25512013117. The reversal of 25512013103 is 30131021552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25512013103 - 2² = 25512013099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25512012103) 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 15 ways as a sum of consecutive naturals, for example, 65150 + ... + 235092.

It is an arithmetic number, because the mean of its divisors is an integer number (1706917536).

Almost surely, 2^25512013103 is an apocalyptic number.

25512013103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25512013103 is a deficient number, since it is larger than the sum of its proper divisors (1798667473).

25512013103 is a wasteful number, since it uses less digits than its factorization.

25512013103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170134.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 25512013103 its reverse (30131021552), we get a palindrome (55643034655).

The spelling of 25512013103 in words is "twenty-five billion, five hundred twelve million, thirteen thousand, one hundred three".