78241315 has 4 divisors (see below), whose sum is σ = 93889584. Its totient is φ = 62593048.

The previous prime is 78241307. The next prime is 78241343. The reversal of 78241315 is 51314287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78241315 - 2³ = 78241307 is a prime.

It is a super-2 number, since 2×78241315² = 12243406745858450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7824127 + ... + 7824136.

It is an arithmetic number, because the mean of its divisors is an integer number (23472396).

Almost surely, 2^78241315 is an apocalyptic number.

78241315 is a deficient number, since it is larger than the sum of its proper divisors (15648269).

78241315 is a wasteful number, since it uses less digits than its factorization.

78241315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15648268.

The product of its digits is 6720, while the sum is 31.

The square root of 78241315 is about 8845.4120876305. The cubic root of 78241315 is about 427.7060370439.

The spelling of 78241315 in words is "seventy-eight million, two hundred forty-one thousand, three hundred fifteen".