212351534 has 4 divisors (see below), whose sum is σ = 318527304. Its totient is φ = 106175766.

The previous prime is 212351533. The next prime is 212351563. The reversal of 212351534 is 435153212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212351533) by changing a digit.

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 as a sum of consecutive naturals, namely, 53087882 + ... + 53087885.

It is an arithmetic number, because the mean of its divisors is an integer number (79631826).

Almost surely, 2^212351534 is an apocalyptic number.

212351534 is a deficient number, since it is larger than the sum of its proper divisors (106175770).

212351534 is a wasteful number, since it uses less digits than its factorization.

212351534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106175769.

The product of its digits is 3600, while the sum is 26.

The square root of 212351534 is about 14572.2865055557. The cubic root of 212351534 is about 596.6025897226.

The spelling of 212351534 in words is "two hundred twelve million, three hundred fifty-one thousand, five hundred thirty-four".