51487461 has 16 divisors (see below), whose sum is σ = 78340800. Its totient is φ = 33396624.

The previous prime is 51487453. The next prime is 51487463. The reversal of 51487461 is 16478415.

It is a happy number.

51487461 is a `hidden beast` number, since 514 + 87 + 4 + 61 = 666.

It is not a de Polignac number, because 51487461 - 2³ = 51487453 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24771 + ... + 26768.

It is an arithmetic number, because the mean of its divisors is an integer number (4896300).

Almost surely, 2^51487461 is an apocalyptic number.

It is an amenable number.

51487461 is a deficient number, since it is larger than the sum of its proper divisors (26853339).

51487461 is a wasteful number, since it uses less digits than its factorization.

51487461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51585 (or 51579 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 51487461 is about 7175.4763604934. The cubic root of 51487461 is about 372.0207454612.

The spelling of 51487461 in words is "fifty-one million, four hundred eighty-seven thousand, four hundred sixty-one".