978231575 has 12 divisors (see below), whose sum is σ = 1215492888. Its totient is φ = 780981600.

The previous prime is 978231559. The next prime is 978231589. The reversal of 978231575 is 575132879.

978231575 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 978231575 - 2⁴ = 978231559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27572 + ... + 52121.

It is an arithmetic number, because the mean of its divisors is an integer number (101291074).

Almost surely, 2^978231575 is an apocalyptic number.

978231575 is a deficient number, since it is larger than the sum of its proper divisors (237261313).

978231575 is a wasteful number, since it uses less digits than its factorization.

978231575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80194 (or 80189 counting only the distinct ones).

The product of its digits is 529200, while the sum is 47.

The square root of 978231575 is about 31276.6937990575. The cubic root of 978231575 is about 992.6905606051.

The spelling of 978231575 in words is "nine hundred seventy-eight million, two hundred thirty-one thousand, five hundred seventy-five".