51404531 has 8 divisors (see below), whose sum is σ = 52390800. Its totient is φ = 50427520.

The previous prime is 51404527. The next prime is 51404533. The reversal of 51404531 is 13540415.

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 51404531 - 2² = 51404527 is a prime.

It is a super-2 number, since 2×51404531² = 5284851614659922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51404497 and 51404506.

It is not an unprimeable number, because it can be changed into a prime (51404533) 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, 9455 + ... + 13863.

It is an arithmetic number, because the mean of its divisors is an integer number (6548850).

Almost surely, 2^51404531 is an apocalyptic number.

51404531 is a deficient number, since it is larger than the sum of its proper divisors (986269).

51404531 is a wasteful number, since it uses less digits than its factorization.

51404531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51404531 is about 7169.6953212811. The cubic root of 51404531 is about 371.8209022453.

Adding to 51404531 its reverse (13540415), we get a palindrome (64944946).

The spelling of 51404531 in words is "fifty-one million, four hundred four thousand, five hundred thirty-one".