31503454155397 has 16 divisors (see below), whose sum is σ = 36522951708672. Its totient is φ = 26613955675440.

The previous prime is 31503454155391. The next prime is 31503454155421. The reversal of 31503454155397 is 79355145430513.

It is a happy number.

It is not a de Polignac number, because 31503454155397 - 2³ = 31503454155389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31503454155391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8809453 + ... + 11858050.

It is an arithmetic number, because the mean of its divisors is an integer number (2282684481792).

Almost surely, 2^{31503454155397} is an apocalyptic number.

It is an amenable number.

31503454155397 is a deficient number, since it is larger than the sum of its proper divisors (5019497553275).

31503454155397 is a wasteful number, since it uses less digits than its factorization.

31503454155397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20670648.

The product of its (nonzero) digits is 17010000, while the sum is 55.

The spelling of 31503454155397 in words is "thirty-one trillion, five hundred three billion, four hundred fifty-four million, one hundred fifty-five thousand, three hundred ninety-seven".