51560490 has 96 divisors (see below), whose sum is σ = 138813120. Its totient is φ = 12220416.

The previous prime is 51560489. The next prime is 51560491. The reversal of 51560490 is 9406515.

It is an interprime number because it is at equal distance from previous prime (51560489) and next prime (51560491).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51560491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164574 + ... + 164886.

It is an arithmetic number, because the mean of its divisors is an integer number (1445970).

Almost surely, 2^51560490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51560490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69406560).

51560490 is an abundant number, since it is smaller than the sum of its proper divisors (87252630).

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

51560490 is a wasteful number, since it uses less digits than its factorization.

51560490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51560490 is about 7180.5633483732. The cubic root of 51560490 is about 372.1965518133.

The spelling of 51560490 in words is "fifty-one million, five hundred sixty thousand, four hundred ninety".