212071431 has 32 divisors (see below), whose sum is σ = 346655232. Its totient is φ = 113477760.

The previous prime is 212071423. The next prime is 212071451. The reversal of 212071431 is 134170212.

212071431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212071431 - 2³ = 212071423 is a prime.

It is a super-2 number, since 2×212071431² = 89948583692775522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212071398 and 212071407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212071411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 880 + ... + 20613.

It is an arithmetic number, because the mean of its divisors is an integer number (10832976).

Almost surely, 2^212071431 is an apocalyptic number.

212071431 is a deficient number, since it is larger than the sum of its proper divisors (134583801).

212071431 is a wasteful number, since it uses less digits than its factorization.

212071431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21543.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 212071431 is about 14562.6725225832. The cubic root of 212071431 is about 596.3401574220.

The spelling of 212071431 in words is "two hundred twelve million, seventy-one thousand, four hundred thirty-one".