2145364212531 has 16 divisors (see below), whose sum is σ = 2865664484000. Its totient is φ = 1427654211840.

The previous prime is 2145364212521. The next prime is 2145364212553. The reversal of 2145364212531 is 1352124635412.

It is not a de Polignac number, because 2145364212531 - 2¹³ = 2145364204339 is a prime.

It is a super-2 number, since 2×2145364212531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145364212531.

It is not an unprimeable number, because it can be changed into a prime (2145364212521) 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, 10470951 + ... + 10673871.

It is an arithmetic number, because the mean of its divisors is an integer number (179104030250).

Almost surely, 2^{2145364212531} is an apocalyptic number.

2145364212531 is a deficient number, since it is larger than the sum of its proper divisors (720300271469).

2145364212531 is a wasteful number, since it uses less digits than its factorization.

2145364212531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209286.

The product of its digits is 172800, while the sum is 39.

Adding to 2145364212531 its reverse (1352124635412), we get a palindrome (3497488847943).

The spelling of 2145364212531 in words is "two trillion, one hundred forty-five billion, three hundred sixty-four million, two hundred twelve thousand, five hundred thirty-one".