212661026 has 4 divisors (see below), whose sum is σ = 318991542. Its totient is φ = 106330512.

The previous prime is 212660989. The next prime is 212661083. The reversal of 212661026 is 620166212.

212661026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 189090001 + 23571025 = 13751^2 + 4855^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212660986 and 212661004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53165255 + ... + 53165258.

Almost surely, 2^212661026 is an apocalyptic number.

212661026 is a deficient number, since it is larger than the sum of its proper divisors (106330516).

212661026 is a wasteful number, since it uses less digits than its factorization.

212661026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106330515.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 212661026 is about 14582.9018374259. The cubic root of 212661026 is about 596.8922887493.

The spelling of 212661026 in words is "two hundred twelve million, six hundred sixty-one thousand, twenty-six".