42055321440 has 144 divisors (see below), whose sum is σ = 145612407024. Its totient is φ = 10195215360.

The previous prime is 42055321417. The next prime is 42055321457. The reversal of 42055321440 is 4412355024.

It is a super-2 number, since 2×42055321440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42055321398 and 42055321407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303967 + ... + 420126.

It is an arithmetic number, because the mean of its divisors is an integer number (1011197271).

Almost surely, 2^42055321440 is an apocalyptic number.

42055321440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42055321440 is an abundant number, since it is smaller than the sum of its proper divisors (103557085584).

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

42055321440 is a wasteful number, since it uses less digits than its factorization.

42055321440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724133 (or 724114 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 42055321440 its reverse (4412355024), we get a palindrome (46467676464).

The spelling of 42055321440 in words is "forty-two billion, fifty-five million, three hundred twenty-one thousand, four hundred forty".