100172213 has 4 divisors (see below), whose sum is σ = 100232940. Its totient is φ = 100111488.

The previous prime is 100172203. The next prime is 100172249. The reversal of 100172213 is 312271001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59938564 + 40233649 = 7742^2 + 6343^2 .

It is a cyclic number.

It is not a de Polignac number, because 100172213 - 2¹⁴ = 100155829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100172191 and 100172200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100172203) 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, 27818 + ... + 31211.

It is an arithmetic number, because the mean of its divisors is an integer number (25058235).

Almost surely, 2^100172213 is an apocalyptic number.

It is an amenable number.

100172213 is a deficient number, since it is larger than the sum of its proper divisors (60727).

100172213 is an equidigital number, since it uses as much as digits as its factorization.

100172213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60726.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 100172213 is about 10008.6069460240. The cubic root of 100172213 is about 464.4251778677.

The spelling of 100172213 in words is "one hundred million, one hundred seventy-two thousand, two hundred thirteen".