31338503481 has 4 divisors (see below), whose sum is σ = 41784671312. Its totient is φ = 20892335652.

The previous prime is 31338503447. The next prime is 31338503503. The reversal of 31338503481 is 18430583313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31338503481 - 2¹³ = 31338495289 is a prime.

It is a super-2 number, since 2×31338503481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31338503431) 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, 5223083911 + ... + 5223083916.

It is an arithmetic number, because the mean of its divisors is an integer number (10446167828).

Almost surely, 2^31338503481 is an apocalyptic number.

It is an amenable number.

31338503481 is a deficient number, since it is larger than the sum of its proper divisors (10446167831).

31338503481 is a wasteful number, since it uses less digits than its factorization.

31338503481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10446167830.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 31338503481 in words is "thirty-one billion, three hundred thirty-eight million, five hundred three thousand, four hundred eighty-one".