68231519 has 4 divisors (see below), whose sum is σ = 70584360. Its totient is φ = 65878680.

The previous prime is 68231509. The next prime is 68231521. The reversal of 68231519 is 91513286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91513286 = 2 ⋅45756643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68231519 is a prime.

It is a super-2 number, since 2×68231519² = 9311080370094722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68231509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176377 + ... + 1176434.

It is an arithmetic number, because the mean of its divisors is an integer number (17646090).

Almost surely, 2^68231519 is an apocalyptic number.

68231519 is a deficient number, since it is larger than the sum of its proper divisors (2352841).

68231519 is a wasteful number, since it uses less digits than its factorization.

68231519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352840.

The product of its digits is 12960, while the sum is 35.

The square root of 68231519 is about 8260.2372241964. The cubic root of 68231519 is about 408.6282113073.

The spelling of 68231519 in words is "sixty-eight million, two hundred thirty-one thousand, five hundred nineteen".