51611290 has 8 divisors (see below), whose sum is σ = 92900340. Its totient is φ = 20644512.

The previous prime is 51611279. The next prime is 51611291. The reversal of 51611290 is 9211615.

It can be written as a sum of positive squares in 2 ways, for example, as 50168889 + 1442401 = 7083^2 + 1201^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51611291) 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, 2580555 + ... + 2580574.

Almost surely, 2^51611290 is an apocalyptic number.

51611290 is a deficient number, since it is larger than the sum of its proper divisors (41289050).

51611290 is a wasteful number, since it uses less digits than its factorization.

51611290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5161136.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 51611290 is about 7184.0998044292. The cubic root of 51611290 is about 372.3187473075.

The spelling of 51611290 in words is "fifty-one million, six hundred eleven thousand, two hundred ninety".