211242426 has 16 divisors (see below), whose sum is σ = 426225024. Its totient is φ = 69790784.

The previous prime is 211242407. The next prime is 211242469. The reversal of 211242426 is 624242112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211242396 and 211242405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155106 + ... + 156461.

It is an arithmetic number, because the mean of its divisors is an integer number (26639064).

Almost surely, 2^211242426 is an apocalyptic number.

211242426 is an abundant number, since it is smaller than the sum of its proper divisors (214982598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211242426 is a wasteful number, since it uses less digits than its factorization.

211242426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311685.

The product of its digits is 1536, while the sum is 24.

The square root of 211242426 is about 14534.1812978922. The cubic root of 211242426 is about 595.5620948150.

Adding to 211242426 its reverse (624242112), we get a palindrome (835484538).

The spelling of 211242426 in words is "two hundred eleven million, two hundred forty-two thousand, four hundred twenty-six".