31504121043 has 4 divisors (see below), whose sum is σ = 42005494728. Its totient is φ = 21002747360.

The previous prime is 31504121023. The next prime is 31504121057. The reversal of 31504121043 is 34012140513.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31504121043 - 2⁸ = 31504120787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31504121023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250686838 + ... + 5250686843.

It is an arithmetic number, because the mean of its divisors is an integer number (10501373682).

Almost surely, 2^31504121043 is an apocalyptic number.

31504121043 is a deficient number, since it is larger than the sum of its proper divisors (10501373685).

31504121043 is a wasteful number, since it uses less digits than its factorization.

31504121043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501373684.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 31504121043 its reverse (34012140513), we get a palindrome (65516261556).

The spelling of 31504121043 in words is "thirty-one billion, five hundred four million, one hundred twenty-one thousand, forty-three".