22031142440 has 32 divisors (see below), whose sum is σ = 49584584160. Its totient is φ = 8809876800.

The previous prime is 22031142391. The next prime is 22031142473. The reversal of 22031142440 is 4424113022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60755 + ... + 218525.

It is an arithmetic number, because the mean of its divisors is an integer number (1549518255).

Almost surely, 2^22031142440 is an apocalyptic number.

22031142440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22031142440 is an abundant number, since it is smaller than the sum of its proper divisors (27553441720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22031142440 is a wasteful number, since it uses less digits than its factorization.

22031142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161273 (or 161269 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22031142440 its reverse (4424113022), we get a palindrome (26455255462).

The spelling of 22031142440 in words is "twenty-two billion, thirty-one million, one hundred forty-two thousand, four hundred forty".