215042242074 has 128 divisors (see below), whose sum is σ = 483886061568. Its totient is φ = 63163100160.

The previous prime is 215042242069. The next prime is 215042242081. The reversal of 215042242074 is 470242240512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67985217 + ... + 67988379.

It is an arithmetic number, because the mean of its divisors is an integer number (3780359856).

Almost surely, 2^215042242074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215042242074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241943030784).

215042242074 is an abundant number, since it is smaller than the sum of its proper divisors (268843819494).

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

215042242074 is a wasteful number, since it uses less digits than its factorization.

215042242074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492.

The product of its (nonzero) digits is 35840, while the sum is 33.

Adding to 215042242074 its reverse (470242240512), we get a palindrome (685284482586).

It can be divided in two parts, 2150 and 42242074, that added together give a palindrome (42244224).

The spelling of 215042242074 in words is "two hundred fifteen billion, forty-two million, two hundred forty-two thousand, seventy-four".