31005400345541 has 16 divisors (see below), whose sum is σ = 31171699025280. Its totient is φ = 30839519949120.

The previous prime is 31005400345453. The next prime is 31005400345583. The reversal of 31005400345541 is 14554300450013.

It is a cyclic number.

It is not a de Polignac number, because 31005400345541 - 2¹⁸ = 31005400083397 is a prime.

It is a super-2 number, since 2×31005400345541² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31005400315541) 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, 690382595 + ... + 690427503.

It is an arithmetic number, because the mean of its divisors is an integer number (1948231189080).

Almost surely, 2^{31005400345541} is an apocalyptic number.

It is an amenable number.

31005400345541 is a deficient number, since it is larger than the sum of its proper divisors (166298679739).

31005400345541 is a wasteful number, since it uses less digits than its factorization.

31005400345541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49484.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 31005400345541 its reverse (14554300450013), we get a palindrome (45559700795554).

The spelling of 31005400345541 in words is "thirty-one trillion, five billion, four hundred million, three hundred forty-five thousand, five hundred forty-one".