511125152221 has 16 divisors (see below), whose sum is σ = 541457991360. Its totient is φ = 481656954240.

The previous prime is 511125152183. The next prime is 511125152287. The reversal of 511125152221 is 122251521115.

It is a cyclic number.

It is not a de Polignac number, because 511125152221 - 2¹³ = 511125144029 is a prime.

It is a super-2 number, since 2×511125152221² (a number of 24 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 511125152221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511125152921) 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, 1492146 + ... + 1802428.

It is an arithmetic number, because the mean of its divisors is an integer number (33841124460).

Almost surely, 2^511125152221 is an apocalyptic number.

It is an amenable number.

511125152221 is a deficient number, since it is larger than the sum of its proper divisors (30332839139).

511125152221 is a wasteful number, since it uses less digits than its factorization.

511125152221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311676.

The product of its digits is 2000, while the sum is 28.

Adding to 511125152221 its reverse (122251521115), we get a palindrome (633376673336).

The spelling of 511125152221 in words is "five hundred eleven billion, one hundred twenty-five million, one hundred fifty-two thousand, two hundred twenty-one".