681015351 has 4 divisors (see below), whose sum is σ = 908020472. Its totient is φ = 454010232.

The previous prime is 681015343. The next prime is 681015367. The reversal of 681015351 is 153510186.

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

It is not a de Polignac number, because 681015351 - 2³ = 681015343 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 (681015301) 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, 113502556 + ... + 113502561.

It is an arithmetic number, because the mean of its divisors is an integer number (227005118).

Almost surely, 2^681015351 is an apocalyptic number.

681015351 is a deficient number, since it is larger than the sum of its proper divisors (227005121).

681015351 is a wasteful number, since it uses less digits than its factorization.

681015351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227005120.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 681015351 is about 26096.2708255413. The cubic root of 681015351 is about 879.8033957313.

The spelling of 681015351 in words is "six hundred eighty-one million, fifteen thousand, three hundred fifty-one".