631218342 has 32 divisors (see below), whose sum is σ = 1371755520. Its totient is φ = 192900960.

The previous prime is 631218337. The next prime is 631218389. The reversal of 631218342 is 243812136.

631218342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85773 + ... + 92840.

It is an arithmetic number, because the mean of its divisors is an integer number (42867360).

Almost surely, 2^631218342 is an apocalyptic number.

631218342 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

631218342 is an abundant number, since it is smaller than the sum of its proper divisors (740537178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631218342 is a wasteful number, since it uses less digits than its factorization.

631218342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178668.

The product of its digits is 6912, while the sum is 30.

The square root of 631218342 is about 25124.0590271556. The cubic root of 631218342 is about 857.8141451702.

The spelling of 631218342 in words is "six hundred thirty-one million, two hundred eighteen thousand, three hundred forty-two".