15256265251 has 4 divisors (see below), whose sum is σ = 16059226600. Its totient is φ = 14453303904.

The previous prime is 15256265237. The next prime is 15256265303.

15256265251 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15256265251 - 2¹³ = 15256257059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15256265221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401480646 + ... + 401480683.

It is an arithmetic number, because the mean of its divisors is an integer number (4014806650).

Almost surely, 2^15256265251 is an apocalyptic number.

15256265251 is a deficient number, since it is larger than the sum of its proper divisors (802961349).

15256265251 is an equidigital number, since it uses as much as digits as its factorization.

15256265251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802961348.

The product of its digits is 180000, while the sum is 40.

The spelling of 15256265251 in words is "fifteen billion, two hundred fifty-six million, two hundred sixty-five thousand, two hundred fifty-one".