78325451 has 4 divisors (see below), whose sum is σ = 78411600. Its totient is φ = 78239304.

The previous prime is 78325447. The next prime is 78325483. The reversal of 78325451 is 15452387.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78325451 - 2² = 78325447 is a prime.

It is a super-2 number, since 2×78325451² = 12269752548706802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78325441) 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, 41696 + ... + 43533.

It is an arithmetic number, because the mean of its divisors is an integer number (19602900).

Almost surely, 2^78325451 is an apocalyptic number.

78325451 is a deficient number, since it is larger than the sum of its proper divisors (86149).

78325451 is an equidigital number, since it uses as much as digits as its factorization.

78325451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86148.

The product of its digits is 33600, while the sum is 35.

The square root of 78325451 is about 8850.1667215934. The cubic root of 78325451 is about 427.8592918981.

The spelling of 78325451 in words is "seventy-eight million, three hundred twenty-five thousand, four hundred fifty-one".