146640213 has 40 divisors (see below), whose sum is σ = 227490648. Its totient is φ = 94058496.

The previous prime is 146640209. The next prime is 146640229. The reversal of 146640213 is 312046641.

146640213 is a `hidden beast` number, since 1 + 4 + 6 + 640 + 2 + 13 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 762129 + 145878084 = 873^2 + 12078^2 .

It is not a de Polignac number, because 146640213 - 2² = 146640209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146640253) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 338445 + ... + 338877.

Almost surely, 2^146640213 is an apocalyptic number.

It is an amenable number.

146640213 is a deficient number, since it is larger than the sum of its proper divisors (80850435).

146640213 is a wasteful number, since it uses less digits than its factorization.

146640213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 146640213 is about 12109.5091973209. The cubic root of 146640213 is about 527.3322848293.

Adding to 146640213 its reverse (312046641), we get a palindrome (458686854).

The spelling of 146640213 in words is "one hundred forty-six million, six hundred forty thousand, two hundred thirteen".