642215614 has 32 divisors (see below), whose sum is σ = 1062097920. Its totient is φ = 290217312.

The previous prime is 642215611. The next prime is 642215687. The reversal of 642215614 is 416512246.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642215611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57577 + ... + 67819.

It is an arithmetic number, because the mean of its divisors is an integer number (33190560).

Almost surely, 2^642215614 is an apocalyptic number.

642215614 is a deficient number, since it is larger than the sum of its proper divisors (419882306).

642215614 is a wasteful number, since it uses less digits than its factorization.

642215614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10344.

The product of its digits is 11520, while the sum is 31.

The square root of 642215614 is about 25341.9733643613. The cubic root of 642215614 is about 862.7671880745.

The spelling of 642215614 in words is "six hundred forty-two million, two hundred fifteen thousand, six hundred fourteen".