51761530 has 16 divisors (see below), whose sum is σ = 93257640. Its totient is φ = 20685312.

The previous prime is 51761527. The next prime is 51761531. The reversal of 51761530 is 3516715.

It can be written as a sum of positive squares in 4 ways, for example, as 51365889 + 395641 = 7167^2 + 629^2 .

It is not an unprimeable number, because it can be changed into a prime (51761531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14482 + ... + 17698.

Almost surely, 2^51761530 is an apocalyptic number.

51761530 is a deficient number, since it is larger than the sum of its proper divisors (41496110).

51761530 is a wasteful number, since it uses less digits than its factorization.

51761530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4833.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 51761530 is about 7194.5486307342. The cubic root of 51761530 is about 372.6796694925.

The spelling of 51761530 in words is "fifty-one million, seven hundred sixty-one thousand, five hundred thirty".