511721652 has 48 divisors (see below), whose sum is σ = 1287312320. Its totient is φ = 157275648.

The previous prime is 511721633. The next prime is 511721653. The reversal of 511721652 is 256127115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511721653) 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, 231183 + ... + 233385.

Almost surely, 2^511721652 is an apocalyptic number.

511721652 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

511721652 is an abundant number, since it is smaller than the sum of its proper divisors (775590668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511721652 is a wasteful number, since it uses less digits than its factorization.

511721652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712 (or 3710 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 511721652 is about 22621.2654818425. The cubic root of 511721652 is about 799.8550008040.

Adding to 511721652 its reverse (256127115), we get a palindrome (767848767).

The spelling of 511721652 in words is "five hundred eleven million, seven hundred twenty-one thousand, six hundred fifty-two".