210242004431 has 2 divisors, whose sum is σ = 210242004432. Its totient is φ = 210242004430.

The previous prime is 210242004419. The next prime is 210242004481. The reversal of 210242004431 is 134400242012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210242004431 is a prime.

It is a super-2 number, since 2×210242004431² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 210242004397 and 210242004406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210242004481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105121002215 + 105121002216.

It is an arithmetic number, because the mean of its divisors is an integer number (105121002216).

Almost surely, 2^210242004431 is an apocalyptic number.

210242004431 is a deficient number, since it is larger than the sum of its proper divisors (1).

210242004431 is an equidigital number, since it uses as much as digits as its factorization.

210242004431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 210242004431 its reverse (134400242012), we get a palindrome (344642246443).

The spelling of 210242004431 in words is "two hundred ten billion, two hundred forty-two million, four thousand, four hundred thirty-one".