31421030342 has 32 divisors (see below), whose sum is σ = 53345053440. Its totient is φ = 13771660320.

The previous prime is 31421030281. The next prime is 31421030357. The reversal of 31421030342 is 24303012413.

It is a super-2 number, since 2×31421030342² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 105884 + ... + 272127.

It is an arithmetic number, because the mean of its divisors is an integer number (1667032920).

Almost surely, 2^31421030342 is an apocalyptic number.

31421030342 is a deficient number, since it is larger than the sum of its proper divisors (21924023098).

31421030342 is a wasteful number, since it uses less digits than its factorization.

31421030342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378188.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31421030342 its reverse (24303012413), we get a palindrome (55724042755).

The spelling of 31421030342 in words is "thirty-one billion, four hundred twenty-one million, thirty thousand, three hundred forty-two".