98825581 has 4 divisors (see below), whose sum is σ = 99175072. Its totient is φ = 98476092.

The previous prime is 98825579. The next prime is 98825599. The reversal of 98825581 is 18552889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18552889 = 823 ⋅22543.

It is a cyclic number.

It is not a de Polignac number, because 98825581 - 2¹ = 98825579 is a prime.

It is a super-2 number, since 2×98825581² = 19532990919975122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98825561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174321 + ... + 174886.

It is an arithmetic number, because the mean of its divisors is an integer number (24793768).

Almost surely, 2^98825581 is an apocalyptic number.

98825581 is the 5740-th hex number.

It is an amenable number.

98825581 is a deficient number, since it is larger than the sum of its proper divisors (349491).

98825581 is a wasteful number, since it uses less digits than its factorization.

98825581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349490.

The product of its digits is 230400, while the sum is 46.

The square root of 98825581 is about 9941.1056226156. The cubic root of 98825581 is about 462.3346665919.

It can be divided in two parts, 988 and 25581, that added together give a square (26569 = 163²).

The spelling of 98825581 in words is "ninety-eight million, eight hundred twenty-five thousand, five hundred eighty-one".