97214155 has 4 divisors (see below), whose sum is σ = 116656992. Its totient is φ = 77771320.

The previous prime is 97214147. The next prime is 97214191. The reversal of 97214155 is 55141279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55141279 = 653 ⋅84443.

It is not a de Polignac number, because 97214155 - 2³ = 97214147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97214155.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9721411 + ... + 9721420.

It is an arithmetic number, because the mean of its divisors is an integer number (29164248).

Almost surely, 2^97214155 is an apocalyptic number.

97214155 is a deficient number, since it is larger than the sum of its proper divisors (19442837).

97214155 is a wasteful number, since it uses less digits than its factorization.

97214155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442836.

The product of its digits is 12600, while the sum is 34.

The square root of 97214155 is about 9859.7238805151. The cubic root of 97214155 is about 459.8079775092.

It can be divided in two parts, 972141 and 55, that added together give a square (972196 = 986²).

The spelling of 97214155 in words is "ninety-seven million, two hundred fourteen thousand, one hundred fifty-five".