213433542 has 80 divisors (see below), whose sum is σ = 551992320. Its totient is φ = 60376752.

The previous prime is 213433541. The next prime is 213433559. The reversal of 213433542 is 245334312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213433541) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 120459 + ... + 122217.

It is an arithmetic number, because the mean of its divisors is an integer number (6899904).

Almost surely, 2^213433542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213433542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275996160).

213433542 is an abundant number, since it is smaller than the sum of its proper divisors (338558778).

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

213433542 is a wasteful number, since it uses less digits than its factorization.

213433542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1878 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 213433542 is about 14609.3648732585. The cubic root of 213433542 is about 597.6141756448.

Adding to 213433542 its reverse (245334312), we get a palindrome (458767854).

The spelling of 213433542 in words is "two hundred thirteen million, four hundred thirty-three thousand, five hundred forty-two".