247220375 has 32 divisors (see below), whose sum is σ = 328603392. Its totient is φ = 185049600.

The previous prime is 247220321. The next prime is 247220387. The reversal of 247220375 is 573022742.

It is a de Polignac number, because none of the positive numbers 2^k-247220375 is a prime.

It is a super-2 number, since 2×247220375² = 122235827630281250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673442 + ... + 673808.

It is an arithmetic number, because the mean of its divisors is an integer number (10268856).

Almost surely, 2^247220375 is an apocalyptic number.

247220375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

247220375 is a deficient number, since it is larger than the sum of its proper divisors (81383017).

247220375 is a wasteful number, since it uses less digits than its factorization.

247220375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 247220375 is about 15723.2431451021. The cubic root of 247220375 is about 627.6170794697.

The spelling of 247220375 in words is "two hundred forty-seven million, two hundred twenty thousand, three hundred seventy-five".