851337381 has 4 divisors (see below), whose sum is σ = 1135116512. Its totient is φ = 567558252.

The previous prime is 851337371. The next prime is 851337439. The reversal of 851337381 is 183733158.

851337381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 851337381 - 2⁹ = 851336869 is a prime.

It is a super-2 number, since 2×851337381² = 1449550672575878322, 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 (851337371) 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, 141889561 + ... + 141889566.

It is an arithmetic number, because the mean of its divisors is an integer number (283779128).

Almost surely, 2^851337381 is an apocalyptic number.

It is an amenable number.

851337381 is a deficient number, since it is larger than the sum of its proper divisors (283779131).

851337381 is a wasteful number, since it uses less digits than its factorization.

851337381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283779130.

The product of its digits is 60480, while the sum is 39.

The square root of 851337381 is about 29177.6863544730. The cubic root of 851337381 is about 947.7647841278.

The spelling of 851337381 in words is "eight hundred fifty-one million, three hundred thirty-seven thousand, three hundred eighty-one".