97213511 has 4 divisors (see below), whose sum is σ = 97236000. Its totient is φ = 97191024.

The previous prime is 97213483. The next prime is 97213513. The reversal of 97213511 is 11531279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11531279 = 2719 ⋅4241.

It is a cyclic number.

It is not a de Polignac number, because 97213511 - 2¹⁰ = 97212487 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 (97213513) 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, 2486 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (24309000).

Almost surely, 2^97213511 is an apocalyptic number.

97213511 is a deficient number, since it is larger than the sum of its proper divisors (22489).

97213511 is a wasteful number, since it uses less digits than its factorization.

97213511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22488.

The product of its digits is 1890, while the sum is 29.

The square root of 97213511 is about 9859.6912223457. The cubic root of 97213511 is about 459.8069621667.

The spelling of 97213511 in words is "ninety-seven million, two hundred thirteen thousand, five hundred eleven".