515400242 has 8 divisors (see below), whose sum is σ = 883543296. Its totient is φ = 220885812.

The previous prime is 515400241. The next prime is 515400253. The reversal of 515400242 is 242004515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (515400241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18407138 + ... + 18407165.

It is an arithmetic number, because the mean of its divisors is an integer number (110442912).

Almost surely, 2^515400242 is an apocalyptic number.

515400242 is a deficient number, since it is larger than the sum of its proper divisors (368143054).

515400242 is a wasteful number, since it uses less digits than its factorization.

515400242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36814312.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 515400242 is about 22702.4281080240. The cubic root of 515400242 is about 801.7670534041.

Adding to 515400242 its reverse (242004515), we get a palindrome (757404757).

The spelling of 515400242 in words is "five hundred fifteen million, four hundred thousand, two hundred forty-two".