211323404013431 has 4 divisors (see below), whose sum is σ = 211323472622592. Its totient is φ = 211323335404272.

The previous prime is 211323404013347. The next prime is 211323404013467. The reversal of 211323404013431 is 134310404323112.

211323404013431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211323404013431 - 2¹⁰ = 211323404012407 is a prime.

It is a super-2 number, since 2×211323404013431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211323404013031) 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, 29455991 + ... + 35920776.

It is an arithmetic number, because the mean of its divisors is an integer number (52830868155648).

Almost surely, 2^{211323404013431} is an apocalyptic number.

211323404013431 is a deficient number, since it is larger than the sum of its proper divisors (68609161).

211323404013431 is an equidigital number, since it uses as much as digits as its factorization.

211323404013431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68609160.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 211323404013431 its reverse (134310404323112), we get a palindrome (345633808336543).

The spelling of 211323404013431 in words is "two hundred eleven trillion, three hundred twenty-three billion, four hundred four million, thirteen thousand, four hundred thirty-one".