25140251215 has 8 divisors (see below), whose sum is σ = 30869890128. Its totient is φ = 19644475200.

The previous prime is 25140251209. The next prime is 25140251221. The reversal of 25140251215 is 51215204152.

It is an interprime number because it is at equal distance from previous prime (25140251209) and next prime (25140251221).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25140251215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58465486 + ... + 58465915.

It is an arithmetic number, because the mean of its divisors is an integer number (3858736266).

Almost surely, 2^25140251215 is an apocalyptic number.

25140251215 is a deficient number, since it is larger than the sum of its proper divisors (5729638913).

25140251215 is a wasteful number, since it uses less digits than its factorization.

25140251215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116931449.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 25140251215 its reverse (51215204152), we get a palindrome (76355455367).

The spelling of 25140251215 in words is "twenty-five billion, one hundred forty million, two hundred fifty-one thousand, two hundred fifteen".