212531434 has 4 divisors (see below), whose sum is σ = 318797154. Its totient is φ = 106265716.

The previous prime is 212531383. The next prime is 212531447. The reversal of 212531434 is 434135212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207446409 + 5085025 = 14403^2 + 2255^2 .

It is a super-2 number, since 2×212531434² = 90339220876192712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212531399 and 212531408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53132857 + ... + 53132860.

Almost surely, 2^212531434 is an apocalyptic number.

212531434 is a deficient number, since it is larger than the sum of its proper divisors (106265720).

212531434 is a wasteful number, since it uses less digits than its factorization.

212531434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106265719.

The product of its digits is 2880, while the sum is 25.

The square root of 212531434 is about 14578.4578745490. The cubic root of 212531434 is about 596.7710187880.

Adding to 212531434 its reverse (434135212), we get a palindrome (646666646).

The spelling of 212531434 in words is "two hundred twelve million, five hundred thirty-one thousand, four hundred thirty-four".