247481220 has 48 divisors (see below), whose sum is σ = 791941248. Its totient is φ = 56567040.

The previous prime is 247481203. The next prime is 247481233. The reversal of 247481220 is 22184742.

It is a super-2 number, since 2×247481220² = 122493908505376800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294201 + ... + 295040.

It is an arithmetic number, because the mean of its divisors is an integer number (16498776).

Almost surely, 2^247481220 is an apocalyptic number.

247481220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247481220 is an abundant number, since it is smaller than the sum of its proper divisors (544460028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247481220 is a wasteful number, since it uses less digits than its factorization.

247481220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589260 (or 589258 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 247481220 is about 15731.5358436486. The cubic root of 247481220 is about 627.8377371631.

The spelling of 247481220 in words is "two hundred forty-seven million, four hundred eighty-one thousand, two hundred twenty".