97021535 has 16 divisors (see below), whose sum is σ = 127751904. Its totient is φ = 70292352.

The previous prime is 97021531. The next prime is 97021541. The reversal of 97021535 is 53512079.

It is not a de Polignac number, because 97021535 - 2² = 97021531 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 (97021531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10637 + ... + 17526.

It is an arithmetic number, because the mean of its divisors is an integer number (7984494).

Almost surely, 2^97021535 is an apocalyptic number.

97021535 is a deficient number, since it is larger than the sum of its proper divisors (30730369).

97021535 is a wasteful number, since it uses less digits than its factorization.

97021535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28234.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 97021535 is about 9849.9510151066. The cubic root of 97021535 is about 459.5040890703.

The spelling of 97021535 in words is "ninety-seven million, twenty-one thousand, five hundred thirty-five".