97642215 has 24 divisors (see below), whose sum is σ = 184633488. Its totient is φ = 47341440.

The previous prime is 97642213. The next prime is 97642231. The reversal of 97642215 is 51224679.

97642215 is a `hidden beast` number, since 9 + 7 + 642 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 97642215 - 2¹ = 97642213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97642215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97642211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98134 + ... + 99123.

It is an arithmetic number, because the mean of its divisors is an integer number (7693062).

Almost surely, 2^97642215 is an apocalyptic number.

97642215 is a deficient number, since it is larger than the sum of its proper divisors (86991273).

97642215 is a wasteful number, since it uses less digits than its factorization.

97642215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197279 (or 197276 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 97642215 is about 9881.4075414386. The cubic root of 97642215 is about 460.4818753101.

The spelling of 97642215 in words is "ninety-seven million, six hundred forty-two thousand, two hundred fifteen".