51526240 has 24 divisors (see below), whose sum is σ = 121731120. Its totient is φ = 20610432.

The previous prime is 51526231. The next prime is 51526259. The reversal of 51526240 is 4262515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160860 + ... + 161179.

It is an arithmetic number, because the mean of its divisors is an integer number (5072130).

Almost surely, 2^51526240 is an apocalyptic number.

It is an amenable number.

51526240 is an abundant number, since it is smaller than the sum of its proper divisors (70204880).

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

51526240 is a wasteful number, since it uses less digits than its factorization.

51526240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322054 (or 322046 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51526240 is about 7178.1780418153. The cubic root of 51526240 is about 372.1141207660.

Adding to 51526240 its reverse (4262515), we get a palindrome (55788755).

The spelling of 51526240 in words is "fifty-one million, five hundred twenty-six thousand, two hundred forty".