51424761 has 4 divisors (see below), whose sum is σ = 68566352. Its totient is φ = 34283172.

The previous prime is 51424741. The next prime is 51424771. The reversal of 51424761 is 16742415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51424761 - 2⁹ = 51424249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51424741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8570791 + ... + 8570796.

It is an arithmetic number, because the mean of its divisors is an integer number (17141588).

Almost surely, 2^51424761 is an apocalyptic number.

It is an amenable number.

51424761 is a deficient number, since it is larger than the sum of its proper divisors (17141591).

51424761 is a wasteful number, since it uses less digits than its factorization.

51424761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17141590.

The product of its digits is 6720, while the sum is 30.

The square root of 51424761 is about 7171.1059816461. The cubic root of 51424761 is about 371.8696719431.

The spelling of 51424761 in words is "fifty-one million, four hundred twenty-four thousand, seven hundred sixty-one".