78125331 has 8 divisors (see below), whose sum is σ = 104241600. Its totient is φ = 52046312.

The previous prime is 78125329. The next prime is 78125393. The reversal of 78125331 is 13352187.

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

It is a cyclic number.

It is not a de Polignac number, because 78125331 - 2¹ = 78125329 is a prime.

It is a super-2 number, since 2×78125331² = 12207134687719122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78125431) 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, 3981 + ... + 13118.

It is an arithmetic number, because the mean of its divisors is an integer number (13030200).

Almost surely, 2^78125331 is an apocalyptic number.

78125331 is a deficient number, since it is larger than the sum of its proper divisors (26116269).

78125331 is a wasteful number, since it uses less digits than its factorization.

78125331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18625.

The product of its digits is 5040, while the sum is 30.

The square root of 78125331 is about 8838.8534889996. The cubic root of 78125331 is about 427.4945904038.

The spelling of 78125331 in words is "seventy-eight million, one hundred twenty-five thousand, three hundred thirty-one".