642380331 has 8 divisors (see below), whose sum is σ = 859556304. Its totient is φ = 426728960.

The previous prime is 642380287. The next prime is 642380353. The reversal of 642380331 is 133083246.

642380331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642380331 - 2⁹ = 642379819 is a prime.

It is a super-2 number, since 2×642380331² = 825304979311339122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642380371) 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, 380166 + ... + 381851.

It is an arithmetic number, because the mean of its divisors is an integer number (107444538).

Almost surely, 2^642380331 is an apocalyptic number.

642380331 is a deficient number, since it is larger than the sum of its proper divisors (217175973).

642380331 is a wasteful number, since it uses less digits than its factorization.

642380331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762301.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 642380331 is about 25345.2230410387. The cubic root of 642380331 is about 862.8409433014.

The spelling of 642380331 in words is "six hundred forty-two million, three hundred eighty thousand, three hundred thirty-one".