51510401 has 8 divisors (see below), whose sum is σ = 53000424. Its totient is φ = 50025600.

The previous prime is 51510383. The next prime is 51510421. The reversal of 51510401 is 10401515.

It can be written as a sum of positive squares in 4 ways, for example, as 1100401 + 50410000 = 1049^2 + 7100^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51510401 - 2¹⁰ = 51509377 is a prime.

It is a super-2 number, since 2×51510401² = 5306642822361602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51510401.

It is not an unprimeable number, because it can be changed into a prime (51510421) 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, 27701 + ... + 29501.

It is an arithmetic number, because the mean of its divisors is an integer number (6625053).

Almost surely, 2^51510401 is an apocalyptic number.

It is an amenable number.

51510401 is a deficient number, since it is larger than the sum of its proper divisors (1490023).

51510401 is a wasteful number, since it uses less digits than its factorization.

51510401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51510401 is about 7177.0746826266. The cubic root of 51510401 is about 372.0759879649.

Adding to 51510401 its reverse (10401515), we get a palindrome (61911916).

The spelling of 51510401 in words is "fifty-one million, five hundred ten thousand, four hundred one".