78243051 has 4 divisors (see below), whose sum is σ = 104324072. Its totient is φ = 52162032.

The previous prime is 78243043. The next prime is 78243059. The reversal of 78243051 is 15034287.

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

It is an interprime number because it is at equal distance from previous prime (78243043) and next prime (78243059).

It is not a de Polignac number, because 78243051 - 2³ = 78243043 is a prime.

It is a super-2 number, since 2×78243051² = 12243950059577202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78243059) 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, 13040506 + ... + 13040511.

It is an arithmetic number, because the mean of its divisors is an integer number (26081018).

Almost surely, 2^78243051 is an apocalyptic number.

78243051 is a deficient number, since it is larger than the sum of its proper divisors (26081021).

78243051 is a wasteful number, since it uses less digits than its factorization.

78243051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26081020.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 78243051 is about 8845.5102170536. The cubic root of 78243051 is about 427.7092003010.

The spelling of 78243051 in words is "seventy-eight million, two hundred forty-three thousand, fifty-one".