51349992 has 16 divisors (see below), whose sum is σ = 128375040. Its totient is φ = 17116656.

The previous prime is 51349967. The next prime is 51349993. The reversal of 51349992 is 29994315.

51349992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51349993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069768 + ... + 1069815.

It is an arithmetic number, because the mean of its divisors is an integer number (8023440).

Almost surely, 2^51349992 is an apocalyptic number.

It is an amenable number.

51349992 is an abundant number, since it is smaller than the sum of its proper divisors (77025048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51349992 is a wasteful number, since it uses less digits than its factorization.

51349992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139592 (or 2139588 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 51349992 is about 7165.8908727387. The cubic root of 51349992 is about 371.6893579645.

It can be divided in two parts, 513499 and 92, that added together give a triangular number (513591 = T₁₀₁₃).

The spelling of 51349992 in words is "fifty-one million, three hundred forty-nine thousand, nine hundred ninety-two".