5215537998 has 80 divisors (see below), whose sum is σ = 12924060336. Its totient is φ = 1558776960.

The previous prime is 5215537997. The next prime is 5215538021. The reversal of 5215537998 is 8997355125.

5215537998 is a `hidden beast` number, since 5 + 2 + 15 + 537 + 9 + 98 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215537997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 110040 + ... + 150132.

Almost surely, 2^5215537998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5215537998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6462030168).

5215537998 is an abundant number, since it is smaller than the sum of its proper divisors (7708522338).

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

5215537998 is a wasteful number, since it uses less digits than its factorization.

5215537998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40191 (or 40182 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 54.

The square root of 5215537998 is about 72218.6817797168. The cubic root of 5215537998 is about 1734.2020872934.

The spelling of 5215537998 in words is "five billion, two hundred fifteen million, five hundred thirty-seven thousand, nine hundred ninety-eight".