97821015 has 8 divisors (see below), whose sum is σ = 156513648. Its totient is φ = 52171200.

The previous prime is 97820981. The next prime is 97821023. The reversal of 97821015 is 51012879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97821015 - 2¹² = 97816919 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3260686 + ... + 3260715.

It is an arithmetic number, because the mean of its divisors is an integer number (19564206).

Almost surely, 2^97821015 is an apocalyptic number.

97821015 is a deficient number, since it is larger than the sum of its proper divisors (58692633).

97821015 is a wasteful number, since it uses less digits than its factorization.

97821015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521409.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 97821015 is about 9890.4506975163. The cubic root of 97821015 is about 460.7627782449.

The spelling of 97821015 in words is "ninety-seven million, eight hundred twenty-one thousand, fifteen".