127816213 has 4 divisors (see below), whose sum is σ = 146075680. Its totient is φ = 109556748.

The previous prime is 127816133. The next prime is 127816219. The reversal of 127816213 is 312618721.

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 de Polignac number, because none of the positive numbers 2^k-127816213 is a prime.

It is a super-2 number, since 2×127816213² = 32673968611322738, 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 (127816219) 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, 9129723 + ... + 9129736.

It is an arithmetic number, because the mean of its divisors is an integer number (36518920).

Almost surely, 2^127816213 is an apocalyptic number.

It is an amenable number.

127816213 is a deficient number, since it is larger than the sum of its proper divisors (18259467).

127816213 is an equidigital number, since it uses as much as digits as its factorization.

127816213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18259466.

The product of its digits is 4032, while the sum is 31.

The square root of 127816213 is about 11305.5832666873. The cubic root of 127816213 is about 503.7270990991.

The spelling of 127816213 in words is "one hundred twenty-seven million, eight hundred sixteen thousand, two hundred thirteen".