78152431 has 8 divisors (see below), whose sum is σ = 89634944. Its totient is φ = 66749400.

The previous prime is 78152429. The next prime is 78152441. The reversal of 78152431 is 13425187.

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 78152431 - 2¹ = 78152429 is a prime.

It is a super-2 number, since 2×78152431² = 12215604942419522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78152393 and 78152402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78152411) 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, 17745 + ... + 21706.

It is an arithmetic number, because the mean of its divisors is an integer number (11204368).

Almost surely, 2^78152431 is an apocalyptic number.

78152431 is a deficient number, since it is larger than the sum of its proper divisors (11482513).

78152431 is a wasteful number, since it uses less digits than its factorization.

78152431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39741.

The product of its digits is 6720, while the sum is 31.

The square root of 78152431 is about 8840.3863603352. The cubic root of 78152431 is about 427.5440142547.

The spelling of 78152431 in words is "seventy-eight million, one hundred fifty-two thousand, four hundred thirty-one".