22155550031 has 4 divisors (see below), whose sum is σ = 22156305600. Its totient is φ = 22154794464.

The previous prime is 22155550003. The next prime is 22155550049. The reversal of 22155550031 is 13005555122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22155550031 - 2⁶ = 22155549967 is a prime.

It is a super-2 number, since 2×22155550031² (a number of 21 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 = 22155549976 and 22155550003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155550061) 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, 331946 + ... + 393063.

It is an arithmetic number, because the mean of its divisors is an integer number (5539076400).

Almost surely, 2^22155550031 is an apocalyptic number.

22155550031 is a deficient number, since it is larger than the sum of its proper divisors (755569).

22155550031 is an equidigital number, since it uses as much as digits as its factorization.

22155550031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755568.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 22155550031 in words is "twenty-two billion, one hundred fifty-five million, five hundred fifty thousand, thirty-one".