22151003440 has 40 divisors (see below), whose sum is σ = 51770757888. Its totient is φ = 8814005760.

The previous prime is 22151003429. The next prime is 22151003447. The reversal of 22151003440 is 4430015122.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (22151003447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709557 + ... + 740116.

Almost surely, 2^22151003440 is an apocalyptic number.

22151003440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22151003440 is an abundant number, since it is smaller than the sum of its proper divisors (29619754448).

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

22151003440 is a wasteful number, since it uses less digits than its factorization.

22151003440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449877 (or 1449871 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 22151003440 its reverse (4430015122), we get a palindrome (26581018562).

The spelling of 22151003440 in words is "twenty-two billion, one hundred fifty-one million, three thousand, four hundred forty".