10256551 has 4 divisors (see below), whose sum is σ = 10702512. Its totient is φ = 9810592.

The previous prime is 10256539. The next prime is 10256557. The reversal of 10256551 is 15565201.

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 10256551 - 2⁹ = 10256039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10256557) 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, 222946 + ... + 222991.

It is an arithmetic number, because the mean of its divisors is an integer number (2675628).

Almost surely, 2^10256551 is an apocalyptic number.

10256551 is a deficient number, since it is larger than the sum of its proper divisors (445961).

10256551 is an equidigital number, since it uses as much as digits as its factorization.

10256551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445960.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 10256551 is about 3202.5850496123. The cubic root of 10256551 is about 217.2703419910.

The spelling of 10256551 in words is "ten million, two hundred fifty-six thousand, five hundred fifty-one".