51154664 has 16 divisors (see below), whose sum is σ = 104634720. Its totient is φ = 23252080.

The previous prime is 51154657. The next prime is 51154679. The reversal of 51154664 is 46645115.

It is a self number, because there is not a number n which added to its sum of digits gives 51154664.

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, 290564 + ... + 290739.

It is an arithmetic number, because the mean of its divisors is an integer number (6539670).

Almost surely, 2^51154664 is an apocalyptic number.

It is an amenable number.

51154664 is an abundant number, since it is smaller than the sum of its proper divisors (53480056).

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

51154664 is a wasteful number, since it uses less digits than its factorization.

51154664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581320 (or 581316 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 51154664 is about 7152.2488771015. The cubic root of 51154664 is about 371.2174748078.

Adding to 51154664 its reverse (46645115), we get a palindrome (97799779).

It can be divided in two parts, 5115 and 4664, that added together give a palindrome (9779).

The spelling of 51154664 in words is "fifty-one million, one hundred fifty-four thousand, six hundred sixty-four".