212397472 has 48 divisors (see below), whose sum is σ = 478880640. Its totient is φ = 90839808.

The previous prime is 212397457. The next prime is 212397481. The reversal of 212397472 is 274793212.

It is a super-2 number, since 2×212397472² = 90225372223981568, which contains 22 as substring.

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, 198154 + ... + 199222.

It is an arithmetic number, because the mean of its divisors is an integer number (9976680).

Almost surely, 2^212397472 is an apocalyptic number.

It is an amenable number.

212397472 is an abundant number, since it is smaller than the sum of its proper divisors (266483168).

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

212397472 is a wasteful number, since it uses less digits than its factorization.

212397472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1965 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 212397472 is about 14573.8626314371. The cubic root of 212397472 is about 596.6456076266.

Subtracting from 212397472 its product of digits (42336), we obtain a triangular number (212355136 = T₂₀₆₀₈).

The spelling of 212397472 in words is "two hundred twelve million, three hundred ninety-seven thousand, four hundred seventy-two".