978513255 has 12 divisors (see below), whose sum is σ = 1696089720. Its totient is φ = 521873712.

The previous prime is 978513241. The next prime is 978513269. The reversal of 978513255 is 552315879.

It is an interprime number because it is at equal distance from previous prime (978513241) and next prime (978513269).

It is not a de Polignac number, because 978513255 - 2⁸ = 978512999 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 21744739 = 978513255 / (9 + 7 + 8 + 5 + 1 + 3 + 2 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 978513255.

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, 10872325 + ... + 10872414.

It is an arithmetic number, because the mean of its divisors is an integer number (141340810).

Almost surely, 2^978513255 is an apocalyptic number.

978513255 is a deficient number, since it is larger than the sum of its proper divisors (717576465).

978513255 is a wasteful number, since it uses less digits than its factorization.

978513255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21744750 (or 21744747 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 978513255 is about 31281.1965084458. The cubic root of 978513255 is about 992.7858326074.

The spelling of 978513255 in words is "nine hundred seventy-eight million, five hundred thirteen thousand, two hundred fifty-five".