98219521 has 4 divisors (see below), whose sum is σ = 99685552. Its totient is φ = 96753492.

The previous prime is 98219509. The next prime is 98219543. The reversal of 98219521 is 12591289.

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: 12591289 = 1699 ⋅7411.

It is a cyclic number.

It is not a de Polignac number, because 98219521 - 2¹⁷ = 98088449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98219551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732915 + ... + 733048.

It is an arithmetic number, because the mean of its divisors is an integer number (24921388).

Almost surely, 2^98219521 is an apocalyptic number.

It is an amenable number.

98219521 is a deficient number, since it is larger than the sum of its proper divisors (1466031).

98219521 is a wasteful number, since it uses less digits than its factorization.

98219521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466030.

The product of its digits is 12960, while the sum is 37.

The square root of 98219521 is about 9910.5762193729. The cubic root of 98219521 is about 461.3876199639.

It can be divided in two parts, 982 and 19521, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 98219521 in words is "ninety-eight million, two hundred nineteen thousand, five hundred twenty-one".