139381515 has 96 divisors (see below), whose sum is σ = 301182336. Its totient is φ = 58060800.

The previous prime is 139381513. The next prime is 139381519. The reversal of 139381515 is 515183931.

139381515 is a `hidden beast` number, since 139 + 3 + 8 + 1 + 515 = 666.

It is not a de Polignac number, because 139381515 - 2¹ = 139381513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139381515.

It is not an unprimeable number, because it can be changed into a prime (139381513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 413427 + ... + 413763.

It is an arithmetic number, because the mean of its divisors is an integer number (3137316).

Almost surely, 2^139381515 is an apocalyptic number.

139381515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139381515 is an abundant number, since it is smaller than the sum of its proper divisors (161800821).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139381515 is a wasteful number, since it uses less digits than its factorization.

139381515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 466 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 139381515 is about 11805.9948754859. The cubic root of 139381515 is about 518.4836433929.

The spelling of 139381515 in words is "one hundred thirty-nine million, three hundred eighty-one thousand, five hundred fifteen".