212453731 has 8 divisors (see below), whose sum is σ = 243468800. Its totient is φ = 181604808.

The previous prime is 212453729. The next prime is 212453837. The reversal of 212453731 is 137354212.

212453731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212453731 - 2¹ = 212453729 is a prime.

It is a super-2 number, since 2×212453731² = 90273175631640722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212453731.

It is not an unprimeable number, because it can be changed into a prime (212451731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38781 + ... + 43918.

It is an arithmetic number, because the mean of its divisors is an integer number (30433600).

Almost surely, 2^212453731 is an apocalyptic number.

212453731 is a deficient number, since it is larger than the sum of its proper divisors (31015069).

212453731 is an equidigital number, since it uses as much as digits as its factorization.

212453731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83073.

The product of its digits is 5040, while the sum is 28.

The square root of 212453731 is about 14575.7926371090. The cubic root of 212453731 is about 596.6982820169.

It can be divided in two parts, 21245 and 3731, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 212453731 in words is "two hundred twelve million, four hundred fifty-three thousand, seven hundred thirty-one".