78131325 has 24 divisors (see below), whose sum is σ = 135978400. Its totient is φ = 39476160.

The previous prime is 78131323. The next prime is 78131353. The reversal of 78131325 is 52313187.

It is not a de Polignac number, because 78131325 - 2¹ = 78131323 is a prime.

It is a super-2 number, since 2×78131325² = 12209007892511250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78131292 and 78131301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78131323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25990 + ... + 28839.

Almost surely, 2^78131325 is an apocalyptic number.

78131325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78131325 is a deficient number, since it is larger than the sum of its proper divisors (57847075).

78131325 is a wasteful number, since it uses less digits than its factorization.

78131325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54861 (or 54856 counting only the distinct ones).

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

The square root of 78131325 is about 8839.1925536216. The cubic root of 78131325 is about 427.5055229956.

The spelling of 78131325 in words is "seventy-eight million, one hundred thirty-one thousand, three hundred twenty-five".