51204550 has 12 divisors (see below), whose sum is σ = 95240556. Its totient is φ = 20481800.

The previous prime is 51204541. The next prime is 51204583. The reversal of 51204550 is 5540215.

It is a congruent number.

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, 511996 + ... + 512095.

It is an arithmetic number, because the mean of its divisors is an integer number (7936713).

Almost surely, 2^51204550 is an apocalyptic number.

51204550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51204550 is a deficient number, since it is larger than the sum of its proper divisors (44036006).

51204550 is a wasteful number, since it uses less digits than its factorization.

51204550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024103 (or 1024098 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51204550 is about 7155.7354618516. The cubic root of 51204550 is about 371.3381059617.

Adding to 51204550 its reverse (5540215), we get a palindrome (56744765).

The spelling of 51204550 in words is "fifty-one million, two hundred four thousand, five hundred fifty".