142231515 has 32 divisors (see below), whose sum is σ = 241807680. Its totient is φ = 71253504.

The previous prime is 142231493. The next prime is 142231561. The reversal of 142231515 is 515132241.

It is a happy number.

It is not a de Polignac number, because 142231515 - 2⁶ = 142231451 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11677 + ... + 20513.

It is an arithmetic number, because the mean of its divisors is an integer number (7556490).

Almost surely, 2^142231515 is an apocalyptic number.

142231515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142231515 is a deficient number, since it is larger than the sum of its proper divisors (99576165).

142231515 is a wasteful number, since it uses less digits than its factorization.

142231515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8911.

The product of its digits is 1200, while the sum is 24.

The square root of 142231515 is about 11926.0854851875. The cubic root of 142231515 is about 521.9937206567.

Adding to 142231515 its reverse (515132241), we get a palindrome (657363756).

The spelling of 142231515 in words is "one hundred forty-two million, two hundred thirty-one thousand, five hundred fifteen".