98551021 has 4 divisors (see below), whose sum is σ = 102835872. Its totient is φ = 94266172.

The previous prime is 98551001. The next prime is 98551039. The reversal of 98551021 is 12015589.

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.

It is a cyclic number.

It is not a de Polignac number, because 98551021 - 2⁹ = 98550509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98551001) 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, 2142391 + ... + 2142436.

It is an arithmetic number, because the mean of its divisors is an integer number (25708968).

Almost surely, 2^98551021 is an apocalyptic number.

It is an amenable number.

98551021 is a deficient number, since it is larger than the sum of its proper divisors (4284851).

98551021 is a wasteful number, since it uses less digits than its factorization.

98551021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4284850.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 98551021 is about 9927.2866887181. The cubic root of 98551021 is about 461.9061124283.

The spelling of 98551021 in words is "ninety-eight million, five hundred fifty-one thousand, twenty-one".