681222052 has 24 divisors (see below), whose sum is σ = 1395676800. Its totient is φ = 284831040.

The previous prime is 681222019. The next prime is 681222107. The reversal of 681222052 is 250222186.

681222052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 681222052.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295552 + ... + 297847.

It is an arithmetic number, because the mean of its divisors is an integer number (58153200).

Almost surely, 2^681222052 is an apocalyptic number.

It is an amenable number.

681222052 is an abundant number, since it is smaller than the sum of its proper divisors (714454748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681222052 is a wasteful number, since it uses less digits than its factorization.

681222052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593451 (or 593449 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 681222052 is about 26100.2308802049. The cubic root of 681222052 is about 879.8923990338.

The spelling of 681222052 in words is "six hundred eighty-one million, two hundred twenty-two thousand, fifty-two".