56213145381 has 16 divisors (see below), whose sum is σ = 78943104000. Its totient is φ = 35481681648.

The previous prime is 56213145341. The next prime is 56213145389. The reversal of 56213145381 is 18354131265.

It is not a de Polignac number, because 56213145381 - 2⁷ = 56213145253 is a prime.

It is a super-2 number, since 2×56213145381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56213145389) 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, 200781 + ... + 390818.

It is an arithmetic number, because the mean of its divisors is an integer number (4933944000).

Almost surely, 2^56213145381 is an apocalyptic number.

It is an amenable number.

56213145381 is a deficient number, since it is larger than the sum of its proper divisors (22729958619).

56213145381 is a wasteful number, since it uses less digits than its factorization.

56213145381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593288.

The product of its digits is 86400, while the sum is 39.

The spelling of 56213145381 in words is "fifty-six billion, two hundred thirteen million, one hundred forty-five thousand, three hundred eighty-one".