22070881 has 4 divisors (see below), whose sum is σ = 25223872. Its totient is φ = 18917892.

The previous prime is 22070861. The next prime is 22070899. The reversal of 22070881 is 18807022.

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 22070881 - 2⁵ = 22070849 is a prime.

It is a super-2 number, since 2×22070881² = 974247576232322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22070831) 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, 1576485 + ... + 1576498.

It is an arithmetic number, because the mean of its divisors is an integer number (6305968).

Almost surely, 2^22070881 is an apocalyptic number.

It is an amenable number.

22070881 is a deficient number, since it is larger than the sum of its proper divisors (3152991).

22070881 is an equidigital number, since it uses as much as digits as its factorization.

22070881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152990.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 22070881 is about 4697.9656235439. The cubic root of 22070881 is about 280.5045367492.

The spelling of 22070881 in words is "twenty-two million, seventy thousand, eight hundred eighty-one".