97072515 has 24 divisors (see below), whose sum is σ = 168534288. Its totient is φ = 51687360.

The previous prime is 97072487. The next prime is 97072519. The reversal of 97072515 is 51527079.

97072515 is a `hidden beast` number, since 9 + 70 + 72 + 515 = 666.

It is not a de Polignac number, because 97072515 - 2¹³ = 97064323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97072515.

It is not an unprimeable number, because it can be changed into a prime (97072519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34045 + ... + 36785.

It is an arithmetic number, because the mean of its divisors is an integer number (7022262).

Almost surely, 2^97072515 is an apocalyptic number.

97072515 is a deficient number, since it is larger than the sum of its proper divisors (71461773).

97072515 is a wasteful number, since it uses less digits than its factorization.

97072515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539 (or 3536 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 97072515 is about 9852.5385053802. The cubic root of 97072515 is about 459.5845571735.

The spelling of 97072515 in words is "ninety-seven million, seventy-two thousand, five hundred fifteen".