512220029781 has 16 divisors (see below), whose sum is σ = 688473800960. Its totient is φ = 338734146240.

The previous prime is 512220029767. The next prime is 512220029869. The reversal of 512220029781 is 187920022215.

It is not a de Polignac number, because 512220029781 - 2¹⁸ = 512219767637 is a prime.

It is a super-2 number, since 2×512220029781² (a number of 24 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 (512220039781) 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, 1189450 + ... + 1561803.

It is an arithmetic number, because the mean of its divisors is an integer number (43029612560).

Almost surely, 2^512220029781 is an apocalyptic number.

It is an amenable number.

512220029781 is a deficient number, since it is larger than the sum of its proper divisors (176253771179).

512220029781 is a wasteful number, since it uses less digits than its factorization.

512220029781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751756.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 512220029781 in words is "five hundred twelve billion, two hundred twenty million, twenty-nine thousand, seven hundred eighty-one".