247664530 has 32 divisors (see below), whose sum is σ = 455704704. Its totient is φ = 96888576.

The previous prime is 247664509. The next prime is 247664531. The reversal of 247664530 is 35466742.

247664530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247664530² = 122675438840241800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247664530.

It is not an unprimeable number, because it can be changed into a prime (247664531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84042 + ... + 86938.

It is an arithmetic number, because the mean of its divisors is an integer number (14240772).

Almost surely, 2^247664530 is an apocalyptic number.

247664530 is a deficient number, since it is larger than the sum of its proper divisors (208040174).

247664530 is a wasteful number, since it uses less digits than its factorization.

247664530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090.

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 247664530 is about 15737.3609604660. The cubic root of 247664530 is about 627.9927126015.

The spelling of 247664530 in words is "two hundred forty-seven million, six hundred sixty-four thousand, five hundred thirty".