2210451681 has 4 divisors (see below), whose sum is σ = 2947268912. Its totient is φ = 1473634452.

The previous prime is 2210451671. The next prime is 2210451787. The reversal of 2210451681 is 1861540122.

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 2210451681 - 2⁷ = 2210451553 is a prime.

It is a super-2 number, since 2×2210451681² = 9772193268071451522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2210451671) 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, 368408611 + ... + 368408616.

It is an arithmetic number, because the mean of its divisors is an integer number (736817228).

Almost surely, 2^2210451681 is an apocalyptic number.

It is an amenable number.

2210451681 is a deficient number, since it is larger than the sum of its proper divisors (736817231).

2210451681 is an equidigital number, since it uses as much as digits as its factorization.

2210451681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736817230.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 2210451681 is about 47015.4408785029. The cubic root of 2210451681 is about 1302.6477949205.

The spelling of 2210451681 in words is "two billion, two hundred ten million, four hundred fifty-one thousand, six hundred eighty-one".