511533213420 has 48 divisors (see below), whose sum is σ = 1432333713888. Its totient is φ = 136404979200.

The previous prime is 511533213409. The next prime is 511533213463. The reversal of 511533213420 is 24312335115.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2462232 + ... + 2661888.

It is an arithmetic number, because the mean of its divisors is an integer number (29840285706).

Almost surely, 2^511533213420 is an apocalyptic number.

It is an amenable number.

511533213420 is an abundant number, since it is smaller than the sum of its proper divisors (920800500468).

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

511533213420 is a wasteful number, since it uses less digits than its factorization.

511533213420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242370 (or 242368 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 511533213420 its reverse (24312335115), we get a palindrome (535845548535).

The spelling of 511533213420 in words is "five hundred eleven billion, five hundred thirty-three million, two hundred thirteen thousand, four hundred twenty".