80722157 has 4 divisors (see below), whose sum is σ = 84231840. Its totient is φ = 77212476.

The previous prime is 80722099. The next prime is 80722183. The reversal of 80722157 is 75122708.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80722157 - 2¹⁰ = 80721133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80722757) by changing a digit.

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, 1754807 + ... + 1754852.

It is an arithmetic number, because the mean of its divisors is an integer number (21057960).

Almost surely, 2^80722157 is an apocalyptic number.

It is an amenable number.

80722157 is a deficient number, since it is larger than the sum of its proper divisors (3509683).

80722157 is a wasteful number, since it uses less digits than its factorization.

80722157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509682.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 80722157 is about 8984.5510182758. The cubic root of 80722157 is about 432.1795896117.

The spelling of 80722157 in words is "eighty million, seven hundred twenty-two thousand, one hundred fifty-seven".