31245345034521 has 8 divisors (see below), whose sum is σ = 41660591806080. Its totient is φ = 20830164142992.

The previous prime is 31245345034513. The next prime is 31245345034549. The reversal of 31245345034521 is 12543054354213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31245345034521 - 2³ = 31245345034513 is a prime.

It is a super-2 number, since 2×31245345034521² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31245345034121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15352530 + ... + 17268203.

It is an arithmetic number, because the mean of its divisors is an integer number (5207573975760).

Almost surely, 2^{31245345034521} is an apocalyptic number.

It is an amenable number.

31245345034521 is a deficient number, since it is larger than the sum of its proper divisors (10415246771559).

31245345034521 is a wasteful number, since it uses less digits than its factorization.

31245345034521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32940015.

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 31245345034521 its reverse (12543054354213), we get a palindrome (43788399388734).

The spelling of 31245345034521 in words is "thirty-one trillion, two hundred forty-five billion, three hundred forty-five million, thirty-four thousand, five hundred twenty-one".