211245031 has 2 divisors, whose sum is σ = 211245032. Its totient is φ = 211245030.

The previous prime is 211245029. The next prime is 211245049. The reversal of 211245031 is 130542112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211245031 - 2¹ = 211245029 is a prime.

It is a super-2 number, since 2×211245031² = 89248926244381922, which contains 22 as substring.

Together with 211245029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211245061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105622515 + 105622516.

It is an arithmetic number, because the mean of its divisors is an integer number (105622516).

Almost surely, 2^211245031 is an apocalyptic number.

211245031 is a deficient number, since it is larger than the sum of its proper divisors (1).

211245031 is an equidigital number, since it uses as much as digits as its factorization.

211245031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 211245031 is about 14534.2709139468. The cubic root of 211245031 is about 595.5645429231.

Adding to 211245031 its reverse (130542112), we get a palindrome (341787143).

The spelling of 211245031 in words is "two hundred eleven million, two hundred forty-five thousand, thirty-one".