213112454311523 has 32 divisors (see below), whose sum is σ = 244393137273600. Its totient is φ = 184430917472256.

The previous prime is 213112454311513. The next prime is 213112454311531. The reversal of 213112454311523 is 325113454211312.

It is not a de Polignac number, because 213112454311523 - 2¹² = 213112454307427 is a prime.

It is a super-2 number, since 2×213112454311523² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213112454311513) 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 31 ways as a sum of consecutive naturals, for example, 53039963 + ... + 56916276.

It is an arithmetic number, because the mean of its divisors is an integer number (7637285539800).

Almost surely, 2^{213112454311523} is an apocalyptic number.

213112454311523 is a deficient number, since it is larger than the sum of its proper divisors (31280682962077).

213112454311523 is a wasteful number, since it uses less digits than its factorization.

213112454311523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109956431.

The product of its digits is 86400, while the sum is 38.

The spelling of 213112454311523 in words is "two hundred thirteen trillion, one hundred twelve billion, four hundred fifty-four million, three hundred eleven thousand, five hundred twenty-three".