210131145405 has 16 divisors (see below), whose sum is σ = 373566480960. Its totient is φ = 112069944144.

The previous prime is 210131145403. The next prime is 210131145409. The reversal of 210131145405 is 504541131012.

210131145405 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 3 + 114 + 540 + 5 = 666.

It is not a de Polignac number, because 210131145405 - 2¹ = 210131145403 is a prime.

It is a super-2 number, since 2×210131145405² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210131145403) 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, 778263367 + ... + 778263636.

It is an arithmetic number, because the mean of its divisors is an integer number (23347905060).

Almost surely, 2^210131145405 is an apocalyptic number.

It is an amenable number.

210131145405 is a deficient number, since it is larger than the sum of its proper divisors (163435335555).

210131145405 is a wasteful number, since it uses less digits than its factorization.

210131145405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556527017 (or 1556527011 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 210131145405 its reverse (504541131012), we get a palindrome (714672276417).

The spelling of 210131145405 in words is "two hundred ten billion, one hundred thirty-one million, one hundred forty-five thousand, four hundred five".