40170213 has 24 divisors (see below), whose sum is σ = 61968192. Its totient is φ = 25014528.

The previous prime is 40170211. The next prime is 40170223. The reversal of 40170213 is 31207104.

It is not a de Polignac number, because 40170213 - 2¹ = 40170211 is a prime.

It is a super-2 number, since 2×40170213² = 3227292024930738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40170211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6645 + ... + 11157.

It is an arithmetic number, because the mean of its divisors is an integer number (2582008).

Almost surely, 2^40170213 is an apocalyptic number.

40170213 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40170213 is a deficient number, since it is larger than the sum of its proper divisors (21797979).

40170213 is a wasteful number, since it uses less digits than its factorization.

40170213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585 (or 4582 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40170213 is about 6337.9975544331. The cubic root of 40170213 is about 342.4796030974.

Adding to 40170213 its reverse (31207104), we get a palindrome (71377317).

The spelling of 40170213 in words is "forty million, one hundred seventy thousand, two hundred thirteen".