78150131 has 2 divisors, whose sum is σ = 78150132. Its totient is φ = 78150130.

The previous prime is 78150119. The next prime is 78150181. The reversal of 78150131 is 13105187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78150131 - 2¹⁰ = 78149107 is a prime.

It is a super-2 number, since 2×78150131² = 12214885950634322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78150131.

It is not a weakly prime, because it can be changed into another prime (78150181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39075065 + 39075066.

It is an arithmetic number, because the mean of its divisors is an integer number (39075066).

Almost surely, 2^78150131 is an apocalyptic number.

78150131 is a deficient number, since it is larger than the sum of its proper divisors (1).

78150131 is an equidigital number, since it uses as much as digits as its factorization.

78150131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 78150131 is about 8840.2562745658. The cubic root of 78150131 is about 427.5398200542.

The spelling of 78150131 in words is "seventy-eight million, one hundred fifty thousand, one hundred thirty-one".