146782231 has 2 divisors, whose sum is σ = 146782232. Its totient is φ = 146782230.

The previous prime is 146782213. The next prime is 146782247. The reversal of 146782231 is 132287641.

Together with previous prime (146782213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146782231 is a prime.

It is a super-2 number, since 2×146782231² = 43090046674674722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146782331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73391115 + 73391116.

It is an arithmetic number, because the mean of its divisors is an integer number (73391116).

Almost surely, 2^146782231 is an apocalyptic number.

146782231 is a deficient number, since it is larger than the sum of its proper divisors (1).

146782231 is an equidigital number, since it uses as much as digits as its factorization.

146782231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 146782231 is about 12115.3716822886. The cubic root of 146782231 is about 527.5024666896.

The spelling of 146782231 in words is "one hundred forty-six million, seven hundred eighty-two thousand, two hundred thirty-one".