247210138 has 32 divisors (see below), whose sum is σ = 431136000. Its totient is φ = 104125824.

The previous prime is 247210133. The next prime is 247210157. The reversal of 247210138 is 831012742.

It is a super-2 number, since 2×247210138² = 122225704659958088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247210133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247456 + ... + 248452.

It is an arithmetic number, because the mean of its divisors is an integer number (13473000).

Almost surely, 2^247210138 is an apocalyptic number.

247210138 is a deficient number, since it is larger than the sum of its proper divisors (183925862).

247210138 is a wasteful number, since it uses less digits than its factorization.

247210138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 247210138 is about 15722.9176045669. The cubic root of 247210138 is about 627.6084164773.

The spelling of 247210138 in words is "two hundred forty-seven million, two hundred ten thousand, one hundred thirty-eight".