51365290 has 8 divisors (see below), whose sum is σ = 92457540. Its totient is φ = 20546112.

The previous prime is 51365261. The next prime is 51365291. The reversal of 51365290 is 9256315.

It can be written as a sum of positive squares in 2 ways, for example, as 49154121 + 2211169 = 7011^2 + 1487^2 .

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 (51365291) 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, 2568255 + ... + 2568274.

Almost surely, 2^51365290 is an apocalyptic number.

51365290 is a deficient number, since it is larger than the sum of its proper divisors (41092250).

51365290 is a wasteful number, since it uses less digits than its factorization.

51365290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136536.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 51365290 is about 7166.9582111242. The cubic root of 51365290 is about 371.7262650733.

The spelling of 51365290 in words is "fifty-one million, three hundred sixty-five thousand, two hundred ninety".