78150431 has 4 divisors (see below), whose sum is σ = 78203664. Its totient is φ = 78097200.

The previous prime is 78150419. The next prime is 78150433. The reversal of 78150431 is 13405187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78150431 is a prime.

It is a super-2 number, since 2×78150431² = 12214979730971522, 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 = 78150394 and 78150403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78150433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24350 + ... + 27371.

It is an arithmetic number, because the mean of its divisors is an integer number (19550916).

Almost surely, 2^78150431 is an apocalyptic number.

78150431 is a deficient number, since it is larger than the sum of its proper divisors (53233).

78150431 is a wasteful number, since it uses less digits than its factorization.

78150431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53232.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 78150431 is about 8840.2732423834. The cubic root of 78150431 is about 427.5403671285.

The spelling of 78150431 in words is "seventy-eight million, one hundred fifty thousand, four hundred thirty-one".