51461485 has 4 divisors (see below), whose sum is σ = 61753788. Its totient is φ = 41169184.

The previous prime is 51461477. The next prime is 51461513. The reversal of 51461485 is 58416415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58416415 = 5 ⋅11683283.

It can be written as a sum of positive squares in 2 ways, for example, as 5248681 + 46212804 = 2291^2 + 6798^2 .

It is a cyclic number.

It is not a de Polignac number, because 51461485 - 2³ = 51461477 is a prime.

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 51461485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5146144 + ... + 5146153.

It is an arithmetic number, because the mean of its divisors is an integer number (15438447).

Almost surely, 2^51461485 is an apocalyptic number.

It is an amenable number.

51461485 is a deficient number, since it is larger than the sum of its proper divisors (10292303).

51461485 is a wasteful number, since it uses less digits than its factorization.

51461485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292302.

The product of its digits is 19200, while the sum is 34.

The square root of 51461485 is about 7173.6660780942. Note that the first 3 decimals coincide. The cubic root of 51461485 is about 371.9581720612.

The spelling of 51461485 in words is "fifty-one million, four hundred sixty-one thousand, four hundred eighty-five".