51540230 has 32 divisors (see below), whose sum is σ = 108497664. Its totient is φ = 17258976.

The previous prime is 51540211. The next prime is 51540233. The reversal of 51540230 is 3204515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51540233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5552 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (3390552).

Almost surely, 2^51540230 is an apocalyptic number.

51540230 is an abundant number, since it is smaller than the sum of its proper divisors (56957434).

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

51540230 is a wasteful number, since it uses less digits than its factorization.

51540230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17180.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51540230 is about 7179.1524569409. The cubic root of 51540230 is about 372.1477955529.

Adding to 51540230 its reverse (3204515), we get a palindrome (54744745).

The spelling of 51540230 in words is "fifty-one million, five hundred forty thousand, two hundred thirty".