51951629 has 4 divisors (see below), whose sum is σ = 53627520. Its totient is φ = 50275740.

The previous prime is 51951619. The next prime is 51951659. The reversal of 51951629 is 92615915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51951629 - 2⁸ = 51951373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51951592 and 51951601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51951619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837899 + ... + 837960.

It is an arithmetic number, because the mean of its divisors is an integer number (13406880).

Almost surely, 2^51951629 is an apocalyptic number.

It is an amenable number.

51951629 is a deficient number, since it is larger than the sum of its proper divisors (1675891).

51951629 is a wasteful number, since it uses less digits than its factorization.

51951629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675890.

The product of its digits is 24300, while the sum is 38.

The square root of 51951629 is about 7207.7478452010. The cubic root of 51951629 is about 373.1353456126.

The spelling of 51951629 in words is "fifty-one million, nine hundred fifty-one thousand, six hundred twenty-nine".