212713378 has 4 divisors (see below), whose sum is σ = 319070070. Its totient is φ = 106356688.

The previous prime is 212713357. The next prime is 212713387. The reversal of 212713378 is 873317212.

It is a happy number.

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., 118875409 + 93837969 = 10903^2 + 9687^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53178343 + ... + 53178346.

Almost surely, 2^212713378 is an apocalyptic number.

212713378 is a deficient number, since it is larger than the sum of its proper divisors (106356692).

212713378 is a wasteful number, since it uses less digits than its factorization.

212713378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106356691.

The product of its digits is 14112, while the sum is 34.

The square root of 212713378 is about 14584.6967057941. The cubic root of 212713378 is about 596.9412648779.

It can be divided in two parts, 21271 and 3378, that added together give a square (24649 = 157²).

The spelling of 212713378 in words is "two hundred twelve million, seven hundred thirteen thousand, three hundred seventy-eight".