511231104 has 48 divisors (see below), whose sum is σ = 1471124070. Its totient is φ = 170409984.

The previous prime is 511231099. The next prime is 511231117. The reversal of 511231104 is 401132115.

It can be written as a sum of positive squares in only one way, i.e., 451137600 + 60093504 = 21240^2 + 7752^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×511231104² = 522714483394117632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220737 + ... + 223040.

Almost surely, 2^511231104 is an apocalyptic number.

It is an amenable number.

511231104 is an abundant number, since it is smaller than the sum of its proper divisors (959892966).

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

511231104 is a wasteful number, since it uses less digits than its factorization.

511231104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443797 (or 443782 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 511231104 is about 22610.4202526180. The cubic root of 511231104 is about 799.5993326990.

Adding to 511231104 its reverse (401132115), we get a palindrome (912363219).

The spelling of 511231104 in words is "five hundred eleven million, two hundred thirty-one thousand, one hundred four".