8251162381 has 64 divisors (see below), whose sum is σ = 11188108800. Its totient is φ = 6011335680.

The previous prime is 8251162379. The next prime is 8251162427. The reversal of 8251162381 is 1832611528.

It is not a de Polignac number, because 8251162381 - 2¹ = 8251162379 is a prime.

It is a super-2 number, since 2×8251162381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8251162381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8251162081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12635451 + ... + 12636103.

It is an arithmetic number, because the mean of its divisors is an integer number (174814200).

Almost surely, 2^8251162381 is an apocalyptic number.

It is an amenable number.

8251162381 is a deficient number, since it is larger than the sum of its proper divisors (2936946419).

8251162381 is a wasteful number, since it uses less digits than its factorization.

8251162381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 885 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 8251162381 is about 90835.9090943664. The cubic root of 8251162381 is about 2020.7149040488.

The spelling of 8251162381 in words is "eight billion, two hundred fifty-one million, one hundred sixty-two thousand, three hundred eighty-one".