210506542 has 16 divisors (see below), whose sum is σ = 326377440. Its totient is φ = 101750688.

The previous prime is 210506531. The next prime is 210506581. The reversal of 210506542 is 245605012.

210506542 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559 + ... + 20677.

It is an arithmetic number, because the mean of its divisors is an integer number (20398590).

Almost surely, 2^210506542 is an apocalyptic number.

210506542 is a deficient number, since it is larger than the sum of its proper divisors (115870898).

210506542 is a wasteful number, since it uses less digits than its factorization.

210506542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315.

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

The square root of 210506542 is about 14508.8435790038. The cubic root of 210506542 is about 594.8697236140.

The spelling of 210506542 in words is "two hundred ten million, five hundred six thousand, five hundred forty-two".