22031315554 has 4 divisors (see below), whose sum is σ = 33046973334. Its totient is φ = 11015657776.

The previous prime is 22031315513. The next prime is 22031315591. The reversal of 22031315554 is 45551313022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45551313022 = 2 ⋅22775656511.

It can be written as a sum of positive squares in only one way, i.e., 20910606025 + 1120709529 = 144605^2 + 33477^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5507828887 + ... + 5507828890.

Almost surely, 2^22031315554 is an apocalyptic number.

22031315554 is a deficient number, since it is larger than the sum of its proper divisors (11015657780).

22031315554 is a wasteful number, since it uses less digits than its factorization.

22031315554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11015657779.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 22031315554 its reverse (45551313022), we get a palindrome (67582628576).

The spelling of 22031315554 in words is "twenty-two billion, thirty-one million, three hundred fifteen thousand, five hundred fifty-four".