247249972 has 24 divisors (see below), whose sum is σ = 460490184. Its totient is φ = 115756032.

The previous prime is 247249949. The next prime is 247249987. The reversal of 247249972 is 279942742.

247249972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 171976996 + 75272976 = 13114^2 + 8676^2 .

It is a super-2 number, since 2×247249972² = 122265097308001568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4168 + ... + 22624.

It is an arithmetic number, because the mean of its divisors is an integer number (19187091).

Almost surely, 2^247249972 is an apocalyptic number.

It is an amenable number.

247249972 is a deficient number, since it is larger than the sum of its proper divisors (213240212).

247249972 is a wasteful number, since it uses less digits than its factorization.

247249972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18675 (or 18673 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 247249972 is about 15724.1843031682. The cubic root of 247249972 is about 627.6421243869.

The spelling of 247249972 in words is "two hundred forty-seven million, two hundred forty-nine thousand, nine hundred seventy-two".