511220422 has 16 divisors (see below), whose sum is σ = 807735600. Its totient is φ = 241993440.

The previous prime is 511220419. The next prime is 511220467. The reversal of 511220422 is 224022115.

It is a super-2 number, since 2×511220422² = 522692639739716168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 511220422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67104 + ... + 74332.

It is an arithmetic number, because the mean of its divisors is an integer number (50483475).

Almost surely, 2^511220422 is an apocalyptic number.

511220422 is a deficient number, since it is larger than the sum of its proper divisors (296515178).

511220422 is a wasteful number, since it uses less digits than its factorization.

511220422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9111.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 511220422 is about 22610.1840328645. The cubic root of 511220422 is about 799.5937635415.

Adding to 511220422 its reverse (224022115), we get a palindrome (735242537).

The spelling of 511220422 in words is "five hundred eleven million, two hundred twenty thousand, four hundred twenty-two".