213548831 has 2 divisors, whose sum is σ = 213548832. Its totient is φ = 213548830.

The previous prime is 213548827. The next prime is 213548833. The reversal of 213548831 is 138845312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213548831 - 2² = 213548827 is a prime.

It is a super-2 number, since 2×213548831² = 91206206442933122, which contains 22 as substring.

Together with 213548833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213548791 and 213548800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213548833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106774415 + 106774416.

It is an arithmetic number, because the mean of its divisors is an integer number (106774416).

Almost surely, 2^213548831 is an apocalyptic number.

213548831 is a deficient number, since it is larger than the sum of its proper divisors (1).

213548831 is an equidigital number, since it uses as much as digits as its factorization.

213548831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 213548831 is about 14613.3100630897. The cubic root of 213548831 is about 597.7217593893.

The spelling of 213548831 in words is "two hundred thirteen million, five hundred forty-eight thousand, eight hundred thirty-one".