511203531203231 has 16 divisors (see below), whose sum is σ = 533691873792000. Its totient is φ = 488737050080928.

The previous prime is 511203531203201. The next prime is 511203531203251. The reversal of 511203531203231 is 132302135302115.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511203531203231 is a prime.

It is a super-2 number, since 2×511203531203231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511203531203201) 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, 1216509545 + ... + 1216929693.

It is an arithmetic number, because the mean of its divisors is an integer number (33355742112000).

Almost surely, 2^{511203531203231} is an apocalyptic number.

511203531203231 is a deficient number, since it is larger than the sum of its proper divisors (22488342588769).

511203531203231 is a wasteful number, since it uses less digits than its factorization.

511203531203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446038.

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 511203531203231 its reverse (132302135302115), we get a palindrome (643505666505346).

The spelling of 511203531203231 in words is "five hundred eleven trillion, two hundred three billion, five hundred thirty-one million, two hundred three thousand, two hundred thirty-one".