7913215 has 16 divisors (see below), whose sum is σ = 10321920. Its totient is φ = 5801760.

The previous prime is 7913209. The next prime is 7913231. The reversal of 7913215 is 5123197.

It is not a de Polignac number, because 7913215 - 2⁵ = 7913183 is a prime.

7913215 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (645120).

Almost surely, 2^7913215 is an apocalyptic number.

7913215 is a deficient number, since it is larger than the sum of its proper divisors (2408705).

7913215 is a wasteful number, since it uses less digits than its factorization.

7913215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its digits is 1890, while the sum is 28.

The square root of 7913215 is about 2813.0437252201. The cubic root of 7913215 is about 199.2741606395.

It can be divided in two parts, 7913 and 215, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 7913215 in words is "seven million, nine hundred thirteen thousand, two hundred fifteen".