213145177 has 8 divisors (see below), whose sum is σ = 245871936. Its totient is φ = 180987792.

The previous prime is 213145151. The next prime is 213145187. The reversal of 213145177 is 771541312.

213145177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213145177 is a prime.

It is a super-2 number, since 2×213145177² = 90861732956722658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213145187) 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, 141538 + ... + 143035.

It is an arithmetic number, because the mean of its divisors is an integer number (30733992).

Almost surely, 2^213145177 is an apocalyptic number.

It is an amenable number.

213145177 is a deficient number, since it is larger than the sum of its proper divisors (32726759).

213145177 is a wasteful number, since it uses less digits than its factorization.

213145177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284687.

The product of its digits is 5880, while the sum is 31.

The square root of 213145177 is about 14599.4923541882. The cubic root of 213145177 is about 597.3449135609.

Adding to 213145177 its reverse (771541312), we get a palindrome (984686489).

The spelling of 213145177 in words is "two hundred thirteen million, one hundred forty-five thousand, one hundred seventy-seven".