51111204 has 12 divisors (see below), whose sum is σ = 119259504. Its totient is φ = 17037064.

The previous prime is 51111199. The next prime is 51111211. The reversal of 51111204 is 40211115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×51111204² = 5224710348659232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129622 + ... + 2129645.

It is an arithmetic number, because the mean of its divisors is an integer number (9938292).

Almost surely, 2^51111204 is an apocalyptic number.

It is an amenable number.

51111204 is an abundant number, since it is smaller than the sum of its proper divisors (68148300).

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

51111204 is a wasteful number, since it uses less digits than its factorization.

51111204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259274 (or 4259272 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 51111204 is about 7149.2100262896. The cubic root of 51111204 is about 371.1123186588.

Adding to 51111204 its reverse (40211115), we get a palindrome (91322319).

It can be divided in two parts, 51111 and 204, that added together give a palindrome (51315).

The spelling of 51111204 in words is "fifty-one million, one hundred eleven thousand, two hundred four".