513111053421 has 12 divisors (see below), whose sum is σ = 741195126048. Its totient is φ = 342058013064.

The previous prime is 513111053401. The next prime is 513111053453. The reversal of 513111053421 is 124350111315.

513111053421 is a `hidden beast` number, since 5 + 1 + 311 + 1 + 0 + 5 + 342 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-513111053421 is a prime.

It is a super-5 number, since 5×513111053421⁵ (a number of 60 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513111053401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1130745 + ... + 1518158.

It is an arithmetic number, because the mean of its divisors is an integer number (61766260504).

Almost surely, 2^513111053421 is an apocalyptic number.

It is an amenable number.

513111053421 is a deficient number, since it is larger than the sum of its proper divisors (228084072627).

513111053421 is a wasteful number, since it uses less digits than its factorization.

513111053421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670432 (or 2670429 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 513111053421 its reverse (124350111315), we get a palindrome (637461164736).

The spelling of 513111053421 in words is "five hundred thirteen billion, one hundred eleven million, fifty-three thousand, four hundred twenty-one".