78085131 has 8 divisors (see below), whose sum is σ = 110237904. Its totient is φ = 48994560.

The previous prime is 78085109. The next prime is 78085157. The reversal of 78085131 is 13158087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78085131 - 2⁵ = 78085099 is a prime.

It is a super-2 number, since 2×78085131² = 12194575366574322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78085092 and 78085101.

It is not an unprimeable number, because it can be changed into a prime (78085171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765490 + ... + 765591.

It is an arithmetic number, because the mean of its divisors is an integer number (13779738).

Almost surely, 2^78085131 is an apocalyptic number.

78085131 is a deficient number, since it is larger than the sum of its proper divisors (32152773).

78085131 is a wasteful number, since it uses less digits than its factorization.

78085131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531101.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 78085131 is about 8836.5791458007. The cubic root of 78085131 is about 427.4212542623.

The spelling of 78085131 in words is "seventy-eight million, eighty-five thousand, one hundred thirty-one".