213942534 has 16 divisors (see below), whose sum is σ = 460799472. Its totient is φ = 65828448.

The previous prime is 213942529. The next prime is 213942539. The reversal of 213942534 is 435249312.

It is an interprime number because it is at equal distance from previous prime (213942529) and next prime (213942539).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213942495 and 213942504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213942539) 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, 1371349 + ... + 1371504.

It is an arithmetic number, because the mean of its divisors is an integer number (28799967).

Almost surely, 2^213942534 is an apocalyptic number.

213942534 is an abundant number, since it is smaller than the sum of its proper divisors (246856938).

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

213942534 is a wasteful number, since it uses less digits than its factorization.

213942534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742871.

The product of its digits is 25920, while the sum is 33.

The square root of 213942534 is about 14626.7745590065. The cubic root of 213942534 is about 598.0888579121.

The spelling of 213942534 in words is "two hundred thirteen million, nine hundred forty-two thousand, five hundred thirty-four".