401800213 has 4 divisors (see below), whose sum is σ = 411144448. Its totient is φ = 392455980.

The previous prime is 401800199. The next prime is 401800237. The reversal of 401800213 is 312008104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401800213 is a prime.

It is a super-2 number, since 2×401800213² = 322886822333690738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401800513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4672053 + ... + 4672138.

It is an arithmetic number, because the mean of its divisors is an integer number (102786112).

Almost surely, 2^401800213 is an apocalyptic number.

401800213 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

401800213 is a deficient number, since it is larger than the sum of its proper divisors (9344235).

401800213 is an equidigital number, since it uses as much as digits as its factorization.

401800213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9344234.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 401800213 is about 20044.9548016452. The cubic root of 401800213 is about 737.9099858878.

Adding to 401800213 its reverse (312008104), we get a palindrome (713808317).

It can be divided in two parts, 40 and 1800213, that added together give a triangular number (1800253 = T₁₈₉₇).

The spelling of 401800213 in words is "four hundred one million, eight hundred thousand, two hundred thirteen".