51052540 has 48 divisors (see below), whose sum is σ = 133668864. Its totient is φ = 15912000.

The previous prime is 51052537. The next prime is 51052543. The reversal of 51052540 is 4525015.

It is an interprime number because it is at equal distance from previous prime (51052537) and next prime (51052543).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51052543) 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, 15036 + ... + 18115.

It is an arithmetic number, because the mean of its divisors is an integer number (2784768).

Almost surely, 2^51052540 is an apocalyptic number.

It is an amenable number.

51052540 is an abundant number, since it is smaller than the sum of its proper divisors (82616324).

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

51052540 is a wasteful number, since it uses less digits than its factorization.

51052540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33178 (or 33176 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51052540 is about 7145.1060174080. The cubic root of 51052540 is about 370.9702802144.

Adding to 51052540 its reverse (4525015), we get a palindrome (55577555).

The spelling of 51052540 in words is "fifty-one million, fifty-two thousand, five hundred forty".