31030134355521 has 144 divisors (see below), whose sum is σ = 58614610639104. Its totient is φ = 15412434960384.

The previous prime is 31030134355499. The next prime is 31030134355541. The reversal of 31030134355521 is 12555343103013.

31030134355521 is a `hidden beast` number, since 3 + 1 + 0 + 30 + 13 + 43 + 55 + 521 = 666.

It is not a de Polignac number, because 31030134355521 - 2⁷ = 31030134355393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31030134355541) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 19967425 + ... + 21465281.

It is an arithmetic number, because the mean of its divisors is an integer number (407045907216).

Almost surely, 2^{31030134355521} is an apocalyptic number.

It is an amenable number.

31030134355521 is a deficient number, since it is larger than the sum of its proper divisors (27584476283583).

31030134355521 is a wasteful number, since it uses less digits than its factorization.

31030134355521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497968 (or 1497936 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

Adding to 31030134355521 its reverse (12555343103013), we get a palindrome (43585477458534).

The spelling of 31030134355521 in words is "thirty-one trillion, thirty billion, one hundred thirty-four million, three hundred fifty-five thousand, five hundred twenty-one".