51851290 has 8 divisors (see below), whose sum is σ = 93332340. Its totient is φ = 20740512.

The previous prime is 51851287. The next prime is 51851299. The reversal of 51851290 is 9215815.

It can be written as a sum of positive squares in 2 ways, for example, as 46936201 + 4915089 = 6851^2 + 2217^2 .

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

It is a super-3 number, since 3×51851290³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51851299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2592555 + ... + 2592574.

Almost surely, 2^51851290 is an apocalyptic number.

51851290 is a deficient number, since it is larger than the sum of its proper divisors (41481050).

51851290 is a wasteful number, since it uses less digits than its factorization.

51851290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185136.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 51851290 is about 7200.7839850950. The cubic root of 51851290 is about 372.8949671563.

The spelling of 51851290 in words is "fifty-one million, eight hundred fifty-one thousand, two hundred ninety".