212253534 has 80 divisors (see below), whose sum is σ = 517440528. Its totient is φ = 64758528.

The previous prime is 212253529. The next prime is 212253563. The reversal of 212253534 is 435352212.

It is a happy number.

212253534 is a `hidden beast` number, since 2 + 122 + 5 + 3 + 534 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 212253498 and 212253507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 100857 + ... + 102939.

Almost surely, 2^212253534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212253534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258720264).

212253534 is an abundant number, since it is smaller than the sum of its proper divisors (305186994).

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

212253534 is a wasteful number, since it uses less digits than its factorization.

212253534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151 (or 2142 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 212253534 is about 14568.9235703946. The cubic root of 212253534 is about 596.5107984537.

The spelling of 212253534 in words is "two hundred twelve million, two hundred fifty-three thousand, five hundred thirty-four".