51049973 has 16 divisors (see below), whose sum is σ = 56843136. Its totient is φ = 45541440.

The previous prime is 51049969. The next prime is 51049981. The reversal of 51049973 is 37994015.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51049973 - 2² = 51049969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101240 + ... + 101742.

It is an arithmetic number, because the mean of its divisors is an integer number (3552696).

Almost surely, 2^51049973 is an apocalyptic number.

It is an amenable number.

51049973 is a deficient number, since it is larger than the sum of its proper divisors (5793163).

51049973 is a wasteful number, since it uses less digits than its factorization.

51049973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 51049973 is about 7144.9263817061. The cubic root of 51049973 is about 370.9640624586.

It can be divided in two parts, 510 and 49973, that multiplied together give a triangular number (25486230 = T₇₁₃₉).

The spelling of 51049973 in words is "fifty-one million, forty-nine thousand, nine hundred seventy-three".