78331051 has 2 divisors, whose sum is σ = 78331052. Its totient is φ = 78331050.

The previous prime is 78331039. The next prime is 78331063. The reversal of 78331051 is 15013387.

It is a balanced prime because it is at equal distance from previous prime (78331039) and next prime (78331063).

It is a cyclic number.

It is not a de Polignac number, because 78331051 - 2¹⁹ = 77806763 is a prime.

It is a super-2 number, since 2×78331051² = 12271507101529202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78331021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39165525 + 39165526.

It is an arithmetic number, because the mean of its divisors is an integer number (39165526).

Almost surely, 2^78331051 is an apocalyptic number.

78331051 is a deficient number, since it is larger than the sum of its proper divisors (1).

78331051 is an equidigital number, since it uses as much as digits as its factorization.

78331051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 78331051 is about 8850.4830941593. The cubic root of 78331051 is about 427.8694884770.

The spelling of 78331051 in words is "seventy-eight million, three hundred thirty-one thousand, fifty-one".