222550021031 has 4 divisors (see below), whose sum is σ = 239669253432. Its totient is φ = 205430788632.

The previous prime is 222550021007. The next prime is 222550021051. The reversal of 222550021031 is 130120055222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130120055222 = 2 ⋅65060027611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222550021031 is a prime.

It is a super-2 number, since 2×222550021031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222550020988 and 222550021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222550021051) 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, 8559616181 + ... + 8559616206.

It is an arithmetic number, because the mean of its divisors is an integer number (59917313358).

Almost surely, 2^222550021031 is an apocalyptic number.

222550021031 is a deficient number, since it is larger than the sum of its proper divisors (17119232401).

222550021031 is a wasteful number, since it uses less digits than its factorization.

222550021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17119232400.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 222550021031 its reverse (130120055222), we get a palindrome (352670076253).

The spelling of 222550021031 in words is "two hundred twenty-two billion, five hundred fifty million, twenty-one thousand, thirty-one".