51235290 has 48 divisors (see below), whose sum is σ = 134529408. Its totient is φ = 13527648.

The previous prime is 51235271. The next prime is 51235291. The reversal of 51235290 is 9253215.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51235291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6507 + ... + 12033.

It is an arithmetic number, because the mean of its divisors is an integer number (2802696).

Almost surely, 2^51235290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51235290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67264704).

51235290 is an abundant number, since it is smaller than the sum of its proper divisors (83294118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51235290 is a wasteful number, since it uses less digits than its factorization.

51235290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643 (or 5640 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51235290 is about 7157.8830669410. The cubic root of 51235290 is about 371.4124004653.

The spelling of 51235290 in words is "fifty-one million, two hundred thirty-five thousand, two hundred ninety".