212534421 has 32 divisors (see below), whose sum is σ = 325721088. Its totient is φ = 122010240.

The previous prime is 212534393. The next prime is 212534473. The reversal of 212534421 is 124435212.

It is not a de Polignac number, because 212534421 - 2⁵ = 212534389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212534391 and 212534400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212534321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79905 + ... + 82521.

It is an arithmetic number, because the mean of its divisors is an integer number (10178784).

Almost surely, 2^212534421 is an apocalyptic number.

It is an amenable number.

212534421 is a deficient number, since it is larger than the sum of its proper divisors (113186667).

212534421 is a wasteful number, since it uses less digits than its factorization.

212534421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761.

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

The square root of 212534421 is about 14578.5603198670. The cubic root of 212534421 is about 596.7738145261.

Adding to 212534421 its reverse (124435212), we get a palindrome (336969633).

The spelling of 212534421 in words is "two hundred twelve million, five hundred thirty-four thousand, four hundred twenty-one".