4256641031 has 4 divisors (see below), whose sum is σ = 4393952064. Its totient is φ = 4119330000.

The previous prime is 4256640959. The next prime is 4256641091. The reversal of 4256641031 is 1301466524.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4256641031 is a prime.

It is a super-2 number, since 2×4256641031² = 36237985733585485922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256641091) 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, 68655470 + ... + 68655531.

It is an arithmetic number, because the mean of its divisors is an integer number (1098488016).

Almost surely, 2^4256641031 is an apocalyptic number.

4256641031 is a deficient number, since it is larger than the sum of its proper divisors (137311033).

4256641031 is a wasteful number, since it uses less digits than its factorization.

4256641031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137311032.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4256641031 is about 65242.9385527660. The cubic root of 4256641031 is about 1620.6491620519.

The spelling of 4256641031 in words is "four billion, two hundred fifty-six million, six hundred forty-one thousand, thirty-one".