211513031 has 12 divisors (see below), whose sum is σ = 231944640. Its totient is φ = 192641280.

The previous prime is 211513021. The next prime is 211513033. The reversal of 211513031 is 130315112.

It is not a de Polignac number, because 211513031 - 2²⁶ = 144404167 is a prime.

It is a super-2 number, since 2×211513031² = 89475524565613922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211513033) 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 in 11 ways as a sum of consecutive naturals, for example, 2846 + ... + 20763.

It is an arithmetic number, because the mean of its divisors is an integer number (19328720).

Almost surely, 2^211513031 is an apocalyptic number.

211513031 is a deficient number, since it is larger than the sum of its proper divisors (20431609).

211513031 is a wasteful number, since it uses less digits than its factorization.

211513031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23674 (or 23657 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 211513031 is about 14543.4875803571. The cubic root of 211513031 is about 595.8162945601.

Adding to 211513031 its reverse (130315112), we get a palindrome (341828143).

The spelling of 211513031 in words is "two hundred eleven million, five hundred thirteen thousand, thirty-one".