212406535 has 16 divisors (see below), whose sum is σ = 280819872. Its totient is φ = 152944000.

The previous prime is 212406487. The next prime is 212406547. The reversal of 212406535 is 535604212.

It is not a de Polignac number, because 212406535 - 2⁹ = 212406023 is a prime.

It is a super-2 number, since 2×212406535² = 90233072221412450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13564 + ... + 24673.

It is an arithmetic number, because the mean of its divisors is an integer number (17551242).

Almost surely, 2^212406535 is an apocalyptic number.

212406535 is a deficient number, since it is larger than the sum of its proper divisors (68413337).

212406535 is a wasteful number, since it uses less digits than its factorization.

212406535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38354.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 212406535 is about 14574.1735614751. The cubic root of 212406535 is about 596.6540937951.

The spelling of 212406535 in words is "two hundred twelve million, four hundred six thousand, five hundred thirty-five".