212498906 has 4 divisors (see below), whose sum is σ = 318748362. Its totient is φ = 106249452.

The previous prime is 212498903. The next prime is 212498911. The reversal of 212498906 is 609894212.

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., 130759225 + 81739681 = 11435^2 + 9041^2 .

It is not an unprimeable number, because it can be changed into a prime (212498903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53124725 + ... + 53124728.

Almost surely, 2^212498906 is an apocalyptic number.

212498906 is a deficient number, since it is larger than the sum of its proper divisors (106249456).

212498906 is a wasteful number, since it uses less digits than its factorization.

212498906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106249455.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 212498906 is about 14577.3422131745. The cubic root of 212498906 is about 596.7405719065.

The spelling of 212498906 in words is "two hundred twelve million, four hundred ninety-eight thousand, nine hundred six".