51137633 has 4 divisors (see below), whose sum is σ = 52102548. Its totient is φ = 50172720.

The previous prime is 51137629. The next prime is 51137641. The reversal of 51137633 is 33673115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45792289 + 5345344 = 6767^2 + 2312^2 .

It is a cyclic number.

It is not a de Polignac number, because 51137633 - 2² = 51137629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51137596 and 51137605.

It is not an unprimeable number, because it can be changed into a prime (51137623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482378 + ... + 482483.

It is an arithmetic number, because the mean of its divisors is an integer number (13025637).

Almost surely, 2^51137633 is an apocalyptic number.

51137633 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51137633 is a deficient number, since it is larger than the sum of its proper divisors (964915).

51137633 is an equidigital number, since it uses as much as digits as its factorization.

51137633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964914.

The product of its digits is 5670, while the sum is 29.

The square root of 51137633 is about 7151.0581734454. The cubic root of 51137633 is about 371.1762735691.

The spelling of 51137633 in words is "fifty-one million, one hundred thirty-seven thousand, six hundred thirty-three".