212431151 has 4 divisors (see below), whose sum is σ = 221667312. Its totient is φ = 203194992.

The previous prime is 212431147. The next prime is 212431159. The reversal of 212431151 is 151134212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212431151 - 2² = 212431147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212431159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4618046 + ... + 4618091.

It is an arithmetic number, because the mean of its divisors is an integer number (55416828).

Almost surely, 2^212431151 is an apocalyptic number.

212431151 is a deficient number, since it is larger than the sum of its proper divisors (9236161).

212431151 is an equidigital number, since it uses as much as digits as its factorization.

212431151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236160.

The product of its digits is 240, while the sum is 20.

The square root of 212431151 is about 14575.0180445857. The cubic root of 212431151 is about 596.6771418459.

Adding to 212431151 its reverse (151134212), we get a palindrome (363565363).

The spelling of 212431151 in words is "two hundred twelve million, four hundred thirty-one thousand, one hundred fifty-one".