247540530 has 16 divisors (see below), whose sum is σ = 594097344. Its totient is φ = 66010800.

The previous prime is 247540523. The next prime is 247540537. The reversal of 247540530 is 35045742.

It is an interprime number because it is at equal distance from previous prime (247540523) and next prime (247540537).

It is a super-2 number, since 2×247540530² = 122552627985361800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 8251351 = 247540530 / (2 + 4 + 7 + 5 + 4 + 0 + 5 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (247540537) 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 7 ways as a sum of consecutive naturals, for example, 4125646 + ... + 4125705.

It is an arithmetic number, because the mean of its divisors is an integer number (37131084).

Almost surely, 2^247540530 is an apocalyptic number.

247540530 is an abundant number, since it is smaller than the sum of its proper divisors (346556814).

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

247540530 is a wasteful number, since it uses less digits than its factorization.

247540530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251361.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 247540530 is about 15733.4207977795. The cubic root of 247540530 is about 627.8878878801.

The spelling of 247540530 in words is "two hundred forty-seven million, five hundred forty thousand, five hundred thirty".