51136801 has 3 divisors (see below), whose sum is σ = 51143953. Its totient is φ = 51129650.

The previous prime is 51136793. The next prime is 51136807. The reversal of 51136801 is 10863115.

The square root of 51136801 is 7151.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 51136801 - 2³ = 51136793 is a prime.

It is a super-2 number, since 2×51136801² = 5229944833027202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51136807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3576 + ... + 10726.

Almost surely, 2^51136801 is an apocalyptic number.

51136801 is the 7151-st square number.

51136801 is the 3576-th centered octagonal number.

It is an amenable number.

51136801 is a deficient number, since it is larger than the sum of its proper divisors (7152).

51136801 is an frugal number, since it uses more digits than its factorization.

51136801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14302 (or 7151 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The cubic root of 51136801 is about 371.1742605680.

Multiplying 51136801 by its sum of digits (25), we get a square (1278420025 = 35755²).

Adding to 51136801 its reverse (10863115), we get a palindrome (61999916).

The spelling of 51136801 in words is "fifty-one million, one hundred thirty-six thousand, eight hundred one".