213351145 has 32 divisors (see below), whose sum is σ = 308275200. Its totient is φ = 141543360.

The previous prime is 213351143. The next prime is 213351161. The reversal of 213351145 is 541153312.

It is a happy number.

It is not a de Polignac number, because 213351145 - 2¹ = 213351143 is a prime.

It is a super-2 number, since 2×213351145² = 91037422145622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213351143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51159 + ... + 55171.

It is an arithmetic number, because the mean of its divisors is an integer number (9633600).

Almost surely, 2^213351145 is an apocalyptic number.

It is an amenable number.

213351145 is a deficient number, since it is larger than the sum of its proper divisors (94924055).

213351145 is an equidigital number, since it uses as much as digits as its factorization.

213351145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070 (or 4056 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 213351145 is about 14606.5445948041. The cubic root of 213351145 is about 597.5372618464.

The spelling of 213351145 in words is "two hundred thirteen million, three hundred fifty-one thousand, one hundred forty-five".