51465457 has 4 divisors (see below), whose sum is σ = 51781360. Its totient is φ = 51149556.

The previous prime is 51465437. The next prime is 51465461. The reversal of 51465457 is 75456415.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 51465457 - 2¹⁹ = 50941169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51465437) 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, 157707 + ... + 158032.

It is an arithmetic number, because the mean of its divisors is an integer number (12945340).

Almost surely, 2^51465457 is an apocalyptic number.

It is an amenable number.

51465457 is a deficient number, since it is larger than the sum of its proper divisors (315903).

51465457 is a wasteful number, since it uses less digits than its factorization.

51465457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315902.

The product of its digits is 84000, while the sum is 37.

The square root of 51465457 is about 7173.9429186466. The cubic root of 51465457 is about 371.9677415470.

The spelling of 51465457 in words is "fifty-one million, four hundred sixty-five thousand, four hundred fifty-seven".