51549560 has 32 divisors (see below), whose sum is σ = 116696160. Its totient is φ = 20493696.

The previous prime is 51549551. The next prime is 51549569. The reversal of 51549560 is 6594515.

It is an interprime number because it is at equal distance from previous prime (51549551) and next prime (51549569).

It is a self number, because there is not a number n which added to its sum of digits gives 51549560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51549569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2822 + ... + 10538.

It is an arithmetic number, because the mean of its divisors is an integer number (3646755).

Almost surely, 2^51549560 is an apocalyptic number.

It is an amenable number.

51549560 is an abundant number, since it is smaller than the sum of its proper divisors (65146600).

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

51549560 is a wasteful number, since it uses less digits than its factorization.

51549560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895 (or 7891 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 51549560 is about 7179.8022256884. The cubic root of 51549560 is about 372.1702500475.

The spelling of 51549560 in words is "fifty-one million, five hundred forty-nine thousand, five hundred sixty".