42155322240 has 128 divisors (see below), whose sum is σ = 134487954720. Its totient is φ = 11231559680.

The previous prime is 42155322197. The next prime is 42155322257. The reversal of 42155322240 is 4222355124.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 42155322198 and 42155322207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2327620 + ... + 2345660.

Almost surely, 2^42155322240 is an apocalyptic number.

42155322240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42155322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67243977360).

42155322240 is an abundant number, since it is smaller than the sum of its proper divisors (92332632480).

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

42155322240 is a wasteful number, since it uses less digits than its factorization.

42155322240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19280 (or 19268 counting only the distinct ones).

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

Adding to 42155322240 its reverse (4222355124), we get a palindrome (46377677364).

The spelling of 42155322240 in words is "forty-two billion, one hundred fifty-five million, three hundred twenty-two thousand, two hundred forty".