31440231242 has 16 divisors (see below), whose sum is σ = 53900534592. Its totient is φ = 13473636000.

The previous prime is 31440231203. The next prime is 31440231257. The reversal of 31440231242 is 24213204413.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253742 + ... + 356742.

It is an arithmetic number, because the mean of its divisors is an integer number (3368783412).

Almost surely, 2^31440231242 is an apocalyptic number.

31440231242 is a deficient number, since it is larger than the sum of its proper divisors (22460303350).

31440231242 is a wasteful number, since it uses less digits than its factorization.

31440231242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124813.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31440231242 its reverse (24213204413), we get a palindrome (55653435655).

The spelling of 31440231242 in words is "thirty-one billion, four hundred forty million, two hundred thirty-one thousand, two hundred forty-two".