78550031 has 8 divisors (see below), whose sum is σ = 89902080. Its totient is φ = 67230648.

The previous prime is 78550027. The next prime is 78550039. The reversal of 78550031 is 13005587.

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 78550031 - 2² = 78550027 is a prime.

It is a super-2 number, since 2×78550031² = 12340214740201922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78549976 and 78550003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78550039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2771 + ... + 12836.

It is an arithmetic number, because the mean of its divisors is an integer number (11237760).

Almost surely, 2^78550031 is an apocalyptic number.

78550031 is a deficient number, since it is larger than the sum of its proper divisors (11352049).

78550031 is a wasteful number, since it uses less digits than its factorization.

78550031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16333.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 78550031 is about 8862.8455362824. The cubic root of 78550031 is about 428.2678306608.

The spelling of 78550031 in words is "seventy-eight million, five hundred fifty thousand, thirty-one".