51762661 has 4 divisors (see below), whose sum is σ = 51806412. Its totient is φ = 51718912.

The previous prime is 51762629. The next prime is 51762677. The reversal of 51762661 is 16626715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16728100 + 35034561 = 4090^2 + 5919^2 .

It is a cyclic number.

It is not a de Polignac number, because 51762661 - 2⁵ = 51762629 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 (51762611) 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, 20050 + ... + 22483.

It is an arithmetic number, because the mean of its divisors is an integer number (12951603).

Almost surely, 2^51762661 is an apocalyptic number.

It is an amenable number.

51762661 is a deficient number, since it is larger than the sum of its proper divisors (43751).

51762661 is a wasteful number, since it uses less digits than its factorization.

51762661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43750.

The product of its digits is 15120, while the sum is 34.

The square root of 51762661 is about 7194.6272314832. The cubic root of 51762661 is about 372.6823838483.

The spelling of 51762661 in words is "fifty-one million, seven hundred sixty-two thousand, six hundred sixty-one".