78231033 has 12 divisors (see below), whose sum is σ = 113081748. Its totient is φ = 52116480.

The previous prime is 78231029. The next prime is 78231047. The reversal of 78231033 is 33013287.

It can be written as a sum of positive squares in 2 ways, for example, as 53758224 + 24472809 = 7332^2 + 4947^2 .

It is not a de Polignac number, because 78231033 - 2² = 78231029 is a prime.

It is a super-2 number, since 2×78231033² = 12240189048494178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78230988 and 78231006.

It is not an unprimeable number, because it can be changed into a prime (78231053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16641 + ... + 20817.

It is an arithmetic number, because the mean of its divisors is an integer number (9423479).

Almost surely, 2^78231033 is an apocalyptic number.

It is an amenable number.

78231033 is a deficient number, since it is larger than the sum of its proper divisors (34850715).

78231033 is a wasteful number, since it uses less digits than its factorization.

78231033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264 (or 6261 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 78231033 is about 8844.8308632783. The cubic root of 78231033 is about 427.6873007103.

The spelling of 78231033 in words is "seventy-eight million, two hundred thirty-one thousand, thirty-three".