642223015 has 8 divisors (see below), whose sum is σ = 880763040. Its totient is φ = 440381472.

The previous prime is 642223013. The next prime is 642223027. The reversal of 642223015 is 510322246.

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

It is a cyclic number.

It is not a de Polignac number, because 642223015 - 2¹ = 642223013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642223013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9174580 + ... + 9174649.

It is an arithmetic number, because the mean of its divisors is an integer number (110095380).

Almost surely, 2^642223015 is an apocalyptic number.

642223015 is a deficient number, since it is larger than the sum of its proper divisors (238540025).

642223015 is a wasteful number, since it uses less digits than its factorization.

642223015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18349241.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 642223015 is about 25342.1193865075. The cubic root of 642223015 is about 862.7705022862.

The spelling of 642223015 in words is "six hundred forty-two million, two hundred twenty-three thousand, fifteen".