80142815 has 4 divisors (see below), whose sum is σ = 96171384. Its totient is φ = 64114248.

The previous prime is 80142757. The next prime is 80142847. The reversal of 80142815 is 51824108.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80142815 is a prime.

It is a super-2 number, since 2×80142815² = 12845741592248450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 8014277 + ... + 8014286.

It is an arithmetic number, because the mean of its divisors is an integer number (24042846).

Almost surely, 2^80142815 is an apocalyptic number.

80142815 is a deficient number, since it is larger than the sum of its proper divisors (16028569).

80142815 is a wasteful number, since it uses less digits than its factorization.

80142815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16028568.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 80142815 is about 8952.2519513249. The cubic root of 80142815 is about 431.1431902393.

The spelling of 80142815 in words is "eighty million, one hundred forty-two thousand, eight hundred fifteen".