212400231 has 16 divisors (see below), whose sum is σ = 289549920. Its totient is φ = 138453120.

The previous prime is 212400229. The next prime is 212400233. The reversal of 212400231 is 132004212.

It is an interprime number because it is at equal distance from previous prime (212400229) and next prime (212400233).

It is not a de Polignac number, because 212400231 - 2¹ = 212400229 is a prime.

It is a super-2 number, since 2×212400231² = 90227716257706722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212400231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212400233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28305 + ... + 35013.

It is an arithmetic number, because the mean of its divisors is an integer number (18096870).

Almost surely, 2^212400231 is an apocalyptic number.

212400231 is a deficient number, since it is larger than the sum of its proper divisors (77149689).

212400231 is a wasteful number, since it uses less digits than its factorization.

212400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212400231 is about 14573.9572868868. The cubic root of 212400231 is about 596.6481910505.

Adding to 212400231 its reverse (132004212), we get a palindrome (344404443).

The spelling of 212400231 in words is "two hundred twelve million, four hundred thousand, two hundred thirty-one".