216741431 has 2 divisors, whose sum is σ = 216741432. Its totient is φ = 216741430.

The previous prime is 216741419. The next prime is 216741439. The reversal of 216741431 is 134147612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216741431 is a prime.

It is a super-2 number, since 2×216741431² = 93953695823855522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216741394 and 216741403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216741439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108370715 + 108370716.

It is an arithmetic number, because the mean of its divisors is an integer number (108370716).

Almost surely, 2^216741431 is an apocalyptic number.

216741431 is a deficient number, since it is larger than the sum of its proper divisors (1).

216741431 is an equidigital number, since it uses as much as digits as its factorization.

216741431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 216741431 is about 14722.1408429617. The cubic root of 216741431 is about 600.6857261860.

The spelling of 216741431 in words is "two hundred sixteen million, seven hundred forty-one thousand, four hundred thirty-one".