31505253453 has 16 divisors (see below), whose sum is σ = 46678746240. Its totient is φ = 21001568832.

The previous prime is 31505253449. The next prime is 31505253487. The reversal of 31505253453 is 35435250513.

31505253453 is a `hidden beast` number, since 3 + 1 + 50 + 525 + 34 + 53 = 666.

It is not a de Polignac number, because 31505253453 - 2² = 31505253449 is a prime.

It is a super-3 number, since 3×31505253453³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31505253433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283525 + ... + 378677.

It is an arithmetic number, because the mean of its divisors is an integer number (2917421640).

Almost surely, 2^31505253453 is an apocalyptic number.

It is an amenable number.

31505253453 is a deficient number, since it is larger than the sum of its proper divisors (15173492787).

31505253453 is a wasteful number, since it uses less digits than its factorization.

31505253453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107425 (or 107419 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

The spelling of 31505253453 in words is "thirty-one billion, five hundred five million, two hundred fifty-three thousand, four hundred fifty-three".