51633731 has 2 divisors, whose sum is σ = 51633732. Its totient is φ = 51633730.

The previous prime is 51633707. The next prime is 51633733. The reversal of 51633731 is 13733615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51633731 - 2⁶ = 51633667 is a prime.

It is a super-2 number, since 2×51633731² = 5332084353960722, which contains 22 as substring.

Together with 51633733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51633694 and 51633703.

It is not a weakly prime, because it can be changed into another prime (51633733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25816865 + 25816866.

It is an arithmetic number, because the mean of its divisors is an integer number (25816866).

Almost surely, 2^51633731 is an apocalyptic number.

51633731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51633731 is an equidigital number, since it uses as much as digits as its factorization.

51633731 is an evil number, because the sum of its binary digits is even.

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

The square root of 51633731 is about 7185.6614865995. The cubic root of 51633731 is about 372.3727018739.

The spelling of 51633731 in words is "fifty-one million, six hundred thirty-three thousand, seven hundred thirty-one".