51206461 has 8 divisors (see below), whose sum is σ = 51667200. Its totient is φ = 50748240.

The previous prime is 51206447. The next prime is 51206471. The reversal of 51206461 is 16460215.

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 51206461 - 2⁵ = 51206429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51206471) 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, 70860 + ... + 71578.

It is an arithmetic number, because the mean of its divisors is an integer number (6458400).

Almost surely, 2^51206461 is an apocalyptic number.

It is an amenable number.

51206461 is a deficient number, since it is larger than the sum of its proper divisors (460739).

51206461 is a wasteful number, since it uses less digits than its factorization.

51206461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51206461 is about 7155.8689898572. The cubic root of 51206461 is about 371.3427254620.

Adding to 51206461 its reverse (16460215), we get a palindrome (67666676).

The spelling of 51206461 in words is "fifty-one million, two hundred six thousand, four hundred sixty-one".