215422350100 has 72 divisors (see below), whose sum is σ = 484680540960. Its totient is φ = 83009297280.

The previous prime is 215422350029. The next prime is 215422350131. The reversal of 215422350100 is 1053224512.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 1200859 + ... + 1368541.

It is an arithmetic number, because the mean of its divisors is an integer number (6731674180).

Almost surely, 2^215422350100 is an apocalyptic number.

215422350100 is a gapful number since it is divisible by the number (20) 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 215422350100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242340270480).

215422350100 is an abundant number, since it is smaller than the sum of its proper divisors (269258190860).

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

215422350100 is a wasteful number, since it uses less digits than its factorization.

215422350100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168169 (or 168162 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 215422350100 its reverse (1053224512), we get a palindrome (216475574612).

The spelling of 215422350100 in words is "two hundred fifteen billion, four hundred twenty-two million, three hundred fifty thousand, one hundred".