9813161251 has 4 divisors (see below), whose sum is σ = 9813545104. Its totient is φ = 9812777400.

The previous prime is 9813161221. The next prime is 9813161263. The reversal of 9813161251 is 1521613189.

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 9813161251 - 2⁵ = 9813161219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9813161251.

It is not an unprimeable number, because it can be changed into a prime (9813161221) 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, 150615 + ... + 205696.

It is an arithmetic number, because the mean of its divisors is an integer number (2453386276).

Almost surely, 2^9813161251 is an apocalyptic number.

9813161251 is a deficient number, since it is larger than the sum of its proper divisors (383853).

9813161251 is a wasteful number, since it uses less digits than its factorization.

9813161251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383852.

The product of its digits is 12960, while the sum is 37.

The square root of 9813161251 is about 99061.4014185142. The cubic root of 9813161251 is about 2140.9325172091.

The spelling of 9813161251 in words is "nine billion, eight hundred thirteen million, one hundred sixty-one thousand, two hundred fifty-one".