51529745 has 8 divisors (see below), whose sum is σ = 61874280. Its totient is φ = 41198080.

The previous prime is 51529739. The next prime is 51529759. The reversal of 51529745 is 54792515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34023889 + 17505856 = 5833^2 + 4184^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51529745 - 2¹⁰ = 51528721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51529699 and 51529708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13511 + ... + 16899.

It is an arithmetic number, because the mean of its divisors is an integer number (7734285).

Almost surely, 2^51529745 is an apocalyptic number.

It is an amenable number.

51529745 is a deficient number, since it is larger than the sum of its proper divisors (10344535).

51529745 is a wasteful number, since it uses less digits than its factorization.

51529745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435.

The product of its digits is 63000, while the sum is 38.

The square root of 51529745 is about 7178.4221803959. The cubic root of 51529745 is about 372.1225580879.

The spelling of 51529745 in words is "fifty-one million, five hundred twenty-nine thousand, seven hundred forty-five".