31400421543505 has 16 divisors (see below), whose sum is σ = 43064536230144. Its totient is φ = 21531167144640.

The previous prime is 31400421543481. The next prime is 31400421543521. The reversal of 31400421543505 is 50534512400413.

It is not a de Polignac number, because 31400421543505 - 2¹³ = 31400421535313 is a prime.

It is a Duffinian 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, 10077517 + ... + 12820186.

It is an arithmetic number, because the mean of its divisors is an integer number (2691533514384).

Almost surely, 2^{31400421543505} is an apocalyptic number.

31400421543505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31400421543505 is a deficient number, since it is larger than the sum of its proper divisors (11664114686639).

31400421543505 is a wasteful number, since it uses less digits than its factorization.

31400421543505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22936896.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 31400421543505 its reverse (50534512400413), we get a palindrome (81934933943918).

The spelling of 31400421543505 in words is "thirty-one trillion, four hundred billion, four hundred twenty-one million, five hundred forty-three thousand, five hundred five".