212153434 has 16 divisors (see below), whose sum is σ = 327229056. Its totient is φ = 103096800.

The previous prime is 212153413. The next prime is 212153477. The reversal of 212153434 is 434351212.

It is a junction number, because it is equal to n+sod(n) for n = 212153399 and 212153408.

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, 17449 + ... + 26995.

It is an arithmetic number, because the mean of its divisors is an integer number (20451816).

Almost surely, 2^212153434 is an apocalyptic number.

212153434 is a deficient number, since it is larger than the sum of its proper divisors (115075622).

212153434 is a wasteful number, since it uses less digits than its factorization.

212153434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9861.

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

The square root of 212153434 is about 14565.4877707545. The cubic root of 212153434 is about 596.4170110557.

It can be divided in two parts, 21215 and 3434, that added together give a square (24649 = 157²).

The spelling of 212153434 in words is "two hundred twelve million, one hundred fifty-three thousand, four hundred thirty-four".