51530895 has 48 divisors (see below), whose sum is σ = 97886880. Its totient is φ = 24922368.

The previous prime is 51530887. The next prime is 51530917. The reversal of 51530895 is 59803515.

It is a happy number.

It is not a de Polignac number, because 51530895 - 2³ = 51530887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33769 + ... + 35261.

It is an arithmetic number, because the mean of its divisors is an integer number (2039310).

Almost surely, 2^51530895 is an apocalyptic number.

51530895 is a deficient number, since it is larger than the sum of its proper divisors (46355985).

51530895 is a wasteful number, since it uses less digits than its factorization.

51530895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1573 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 51530895 is about 7178.5022811169. The cubic root of 51530895 is about 372.1253263127.

It can be divided in two parts, 51530 and 895, that added together give a palindrome (52425).

The spelling of 51530895 in words is "fifty-one million, five hundred thirty thousand, eight hundred ninety-five".