51156629 has 2 divisors, whose sum is σ = 51156630. Its totient is φ = 51156628.

The previous prime is 51156571. The next prime is 51156631. The reversal of 51156629 is 92665115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42902500 + 8254129 = 6550^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 51156629 - 2¹⁶ = 51091093 is a prime.

Together with 51156631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51156659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25578314 + 25578315.

It is an arithmetic number, because the mean of its divisors is an integer number (25578315).

Almost surely, 2^51156629 is an apocalyptic number.

It is an amenable number.

51156629 is a deficient number, since it is larger than the sum of its proper divisors (1).

51156629 is an equidigital number, since it uses as much as digits as its factorization.

51156629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 35.

The square root of 51156629 is about 7152.3862451632. The cubic root of 51156629 is about 371.2222279293. Note that the first 5 decimals are identical.

The spelling of 51156629 in words is "fifty-one million, one hundred fifty-six thousand, six hundred twenty-nine".