642015230 has 8 divisors (see below), whose sum is σ = 1155627432. Its totient is φ = 256806088.

The previous prime is 642015211. The next prime is 642015277. The reversal of 642015230 is 32510246.

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

It is a junction number, because it is equal to n+sod(n) for n = 642015196 and 642015205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32100752 + ... + 32100771.

It is an arithmetic number, because the mean of its divisors is an integer number (144453429).

Almost surely, 2^642015230 is an apocalyptic number.

642015230 is a deficient number, since it is larger than the sum of its proper divisors (513612202).

642015230 is a wasteful number, since it uses less digits than its factorization.

642015230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64201530.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 642015230 is about 25338.0194569347. The cubic root of 642015230 is about 862.6774452526.

Adding to 642015230 its reverse (32510246), we get a palindrome (674525476).

The spelling of 642015230 in words is "six hundred forty-two million, fifteen thousand, two hundred thirty".