51120829 has 4 divisors (see below), whose sum is σ = 52769920. Its totient is φ = 49471740.

The previous prime is 51120827. The next prime is 51120833. The reversal of 51120829 is 92802115.

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 51120829 - 2¹ = 51120827 is a prime.

It is a super-2 number, since 2×51120829² = 5226678315294482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51120797 and 51120806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120827) 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, 824499 + ... + 824560.

It is an arithmetic number, because the mean of its divisors is an integer number (13192480).

Almost surely, 2^51120829 is an apocalyptic number.

It is an amenable number.

51120829 is a deficient number, since it is larger than the sum of its proper divisors (1649091).

51120829 is a wasteful number, since it uses less digits than its factorization.

51120829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649090.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51120829 is about 7149.8831458983. The cubic root of 51120829 is about 371.1356125200.

The spelling of 51120829 in words is "fifty-one million, one hundred twenty thousand, eight hundred twenty-nine".