247946213 has 16 divisors (see below), whose sum is σ = 263319936. Its totient is φ = 233150400.

The previous prime is 247946159. The next prime is 247946249. The reversal of 247946213 is 312649742.

It is a cyclic number.

It is not a de Polignac number, because 247946213 - 2¹⁸ = 247684069 is a prime.

It is a super-2 number, since 2×247946213² = 122954649082082738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247946263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159920 + ... + 161462.

It is an arithmetic number, because the mean of its divisors is an integer number (16457496).

Almost surely, 2^247946213 is an apocalyptic number.

It is an amenable number.

247946213 is a deficient number, since it is larger than the sum of its proper divisors (15373723).

247946213 is a wasteful number, since it uses less digits than its factorization.

247946213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724.

The product of its digits is 72576, while the sum is 38.

The square root of 247946213 is about 15746.3079164609. The cubic root of 247946213 is about 628.2307063767.

The spelling of 247946213 in words is "two hundred forty-seven million, nine hundred forty-six thousand, two hundred thirteen".