213520556130451 has 4 divisors (see below), whose sum is σ = 213617478763672. Its totient is φ = 213423633497232.

The previous prime is 213520556130253. The next prime is 213520556130481. The reversal of 213520556130451 is 154031655025312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213520556130451 - 2¹¹ = 213520556128403 is a prime.

It is a super-2 number, since 2×213520556130451² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213520556130398 and 213520556130407.

It is not an unprimeable number, because it can be changed into a prime (213520556130481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48461313306 + ... + 48461317711.

It is an arithmetic number, because the mean of its divisors is an integer number (53404369690918).

Almost surely, 2^{213520556130451} is an apocalyptic number.

213520556130451 is a deficient number, since it is larger than the sum of its proper divisors (96922633221).

213520556130451 is an equidigital number, since it uses as much as digits as its factorization.

213520556130451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96922633220.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 213520556130451 in words is "two hundred thirteen trillion, five hundred twenty billion, five hundred fifty-six million, one hundred thirty thousand, four hundred fifty-one".