31421042400434 has 4 divisors (see below), whose sum is σ = 47131563600654. Its totient is φ = 15710521200216.

The previous prime is 31421042400421. The next prime is 31421042400479. The reversal of 31421042400434 is 43400424012413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19248374966209 + 12172667434225 = 4387297^2 + 3488935^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31421042400434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855260600107 + ... + 7855260600110.

Almost surely, 2^{31421042400434} is an apocalyptic number.

31421042400434 is a deficient number, since it is larger than the sum of its proper divisors (15710521200220).

31421042400434 is a wasteful number, since it uses less digits than its factorization.

31421042400434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15710521200219.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 31421042400434 its reverse (43400424012413), we get a palindrome (74821466412847).

The spelling of 31421042400434 in words is "thirty-one trillion, four hundred twenty-one billion, forty-two million, four hundred thousand, four hundred thirty-four".