211431431403 has 6 divisors (see below), whose sum is σ = 305400956484. Its totient is φ = 140954287596.

The previous prime is 211431431389. The next prime is 211431431447. The reversal of 211431431403 is 304134134112.

211431431403 is a `hidden beast` number, since 2 + 114 + 3 + 143 + 1 + 403 = 666.

It is not a de Polignac number, because 211431431403 - 2⁸ = 211431431147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211431431473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11746190625 + ... + 11746190642.

It is an arithmetic number, because the mean of its divisors is an integer number (50900159414).

Almost surely, 2^211431431403 is an apocalyptic number.

211431431403 is a deficient number, since it is larger than the sum of its proper divisors (93969525081).

211431431403 is a wasteful number, since it uses less digits than its factorization.

211431431403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23492381273 (or 23492381270 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 211431431403 its reverse (304134134112), we get a palindrome (515565565515).

The spelling of 211431431403 in words is "two hundred eleven billion, four hundred thirty-one million, four hundred thirty-one thousand, four hundred three".