215542434 has 16 divisors (see below), whose sum is σ = 433020672. Its totient is φ = 71524848.

The previous prime is 215542433. The next prime is 215542493. The reversal of 215542434 is 434245512.

215542434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215542433) 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, 79209 + ... + 81884.

It is an arithmetic number, because the mean of its divisors is an integer number (27063792).

Almost surely, 2^215542434 is an apocalyptic number.

215542434 is an abundant number, since it is smaller than the sum of its proper divisors (217478238).

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

215542434 is a wasteful number, since it uses less digits than its factorization.

215542434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161321.

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

The square root of 215542434 is about 14681.3634925371. The cubic root of 215542434 is about 599.5760282616.

Adding to 215542434 its reverse (434245512), we get a palindrome (649787946).

It can be divided in two parts, 21 and 5542434, that added together give a palindrome (5542455).

The spelling of 215542434 in words is "two hundred fifteen million, five hundred forty-two thousand, four hundred thirty-four".