213732019 has 2 divisors, whose sum is σ = 213732020. Its totient is φ = 213732018.

The previous prime is 213731993. The next prime is 213732023. The reversal of 213732019 is 910237312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213732019 - 2⁷ = 213731891 is a prime.

It is a super-2 number, since 2×213732019² = 91362751891632722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213732049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106866009 + 106866010.

It is an arithmetic number, because the mean of its divisors is an integer number (106866010).

Almost surely, 2^213732019 is an apocalyptic number.

213732019 is a deficient number, since it is larger than the sum of its proper divisors (1).

213732019 is an equidigital number, since it uses as much as digits as its factorization.

213732019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 213732019 is about 14619.5765670556. The cubic root of 213732019 is about 597.8926245394.

The spelling of 213732019 in words is "two hundred thirteen million, seven hundred thirty-two thousand, nineteen".