30220057681 has 4 divisors (see below), whose sum is σ = 32967335664. Its totient is φ = 27472779700.

The previous prime is 30220057663. The next prime is 30220057687. The reversal of 30220057681 is 18675002203.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 30220057681 - 2⁹ = 30220057169 is a prime.

It is a super-2 number, since 2×30220057681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30220057687) 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, 1373638975 + ... + 1373638996.

It is an arithmetic number, because the mean of its divisors is an integer number (8241833916).

Almost surely, 2^30220057681 is an apocalyptic number.

It is an amenable number.

30220057681 is a deficient number, since it is larger than the sum of its proper divisors (2747277983).

30220057681 is a wasteful number, since it uses less digits than its factorization.

30220057681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747277982.

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 30220057681 its reverse (18675002203), we get a palindrome (48895059884).

The spelling of 30220057681 in words is "thirty billion, two hundred twenty million, fifty-seven thousand, six hundred eighty-one".