213928031 has 2 divisors, whose sum is σ = 213928032. Its totient is φ = 213928030.

The previous prime is 213928027. The next prime is 213928061. The reversal of 213928031 is 130829312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213928031 - 2² = 213928027 is a prime.

It is a super-2 number, since 2×213928031² = 91530404895073922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213927985 and 213928003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213928061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106964015 + 106964016.

It is an arithmetic number, because the mean of its divisors is an integer number (106964016).

Almost surely, 2^213928031 is an apocalyptic number.

213928031 is a deficient number, since it is larger than the sum of its proper divisors (1).

213928031 is an equidigital number, since it uses as much as digits as its factorization.

213928031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 213928031 is about 14626.2787816997. The cubic root of 213928031 is about 598.0753429453.

The spelling of 213928031 in words is "two hundred thirteen million, nine hundred twenty-eight thousand, thirty-one".