247442258 has 30 divisors (see below), whose sum is σ = 434914071. Its totient is φ = 105579516.

The previous prime is 247442249. The next prime is 247442281. The reversal of 247442258 is 852244742.

It can be written as a sum of positive squares in only one way, i.e., 123721129 + 123721129 = 11123^2 + 11123^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11123.

It is a super-2 number, since 2×247442258² = 122455342088277128, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1089941 + ... + 1090167.

Almost surely, 2^247442258 is an apocalyptic number.

247442258 is a deficient number, since it is larger than the sum of its proper divisors (187471813).

247442258 is an frugal number, since it uses more digits than its factorization.

247442258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 236 counting only the distinct ones).

The product of its digits is 143360, while the sum is 38.

The square root of 247442258 is about 15730.2974542759. The cubic root of 247442258 is about 627.8047877300.

The spelling of 247442258 in words is "two hundred forty-seven million, four hundred forty-two thousand, two hundred fifty-eight".