51546865 has 16 divisors (see below), whose sum is σ = 63138816. Its totient is φ = 40392000.

The previous prime is 51546853. The next prime is 51546917. The reversal of 51546865 is 56864515.

It is not a de Polignac number, because 51546865 - 2¹³ = 51538673 is a prime.

It is a Duffinian number.

Its product of digits (144000) is a multiple of the sum of its prime divisors (1200).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51520 + ... + 52510.

It is an arithmetic number, because the mean of its divisors is an integer number (3946176).

Almost surely, 2^51546865 is an apocalyptic number.

It is an amenable number.

51546865 is a deficient number, since it is larger than the sum of its proper divisors (11591951).

51546865 is a wasteful number, since it uses less digits than its factorization.

51546865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200.

The product of its digits is 144000, while the sum is 40.

The square root of 51546865 is about 7179.6145439710. The cubic root of 51546865 is about 372.1637642740.

The spelling of 51546865 in words is "fifty-one million, five hundred forty-six thousand, eight hundred sixty-five".