213420031 has 8 divisors (see below), whose sum is σ = 232953984. Its totient is φ = 193908120.

The previous prime is 213420007. The next prime is 213420041. The reversal of 213420031 is 130024312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213420031 - 2⁹ = 213419519 is a prime.

It is a super-2 number, since 2×213420031² = 91096219264081922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213419987 and 213420014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213420041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19830 + ... + 28636.

It is an arithmetic number, because the mean of its divisors is an integer number (29119248).

Almost surely, 2^213420031 is an apocalyptic number.

213420031 is a deficient number, since it is larger than the sum of its proper divisors (19533953).

213420031 is a wasteful number, since it uses less digits than its factorization.

213420031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213420031 is about 14608.9024570636. The cubic root of 213420031 is about 597.6015651066.

Adding to 213420031 its reverse (130024312), we get a palindrome (343444343).

The spelling of 213420031 in words is "two hundred thirteen million, four hundred twenty thousand, thirty-one".