212542620 has 24 divisors (see below), whose sum is σ = 595119504. Its totient is φ = 56678016.

The previous prime is 212542613. The next prime is 212542633. The reversal of 212542620 is 26245212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771129 + ... + 1771248.

It is an arithmetic number, because the mean of its divisors is an integer number (24796646).

Almost surely, 2^212542620 is an apocalyptic number.

212542620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212542620 is an abundant number, since it is smaller than the sum of its proper divisors (382576884).

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

212542620 is a wasteful number, since it uses less digits than its factorization.

212542620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542389 (or 3542387 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 212542620 is about 14578.8415177613. The cubic root of 212542620 is about 596.7814883977.

Adding to 212542620 its reverse (26245212), we get a palindrome (238787832).

The spelling of 212542620 in words is "two hundred twelve million, five hundred forty-two thousand, six hundred twenty".