51915673 has 4 divisors (see below), whose sum is σ = 52895268. Its totient is φ = 50936080.

The previous prime is 51915667. The next prime is 51915679. The reversal of 51915673 is 37651915.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51915667) and next prime (51915679).

It can be written as a sum of positive squares in 2 ways, for example, as 26594649 + 25321024 = 5157^2 + 5032^2 .

It is a cyclic number.

It is not a de Polignac number, because 51915673 - 2⁵ = 51915641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51915679) 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, 489718 + ... + 489823.

It is an arithmetic number, because the mean of its divisors is an integer number (13223817).

Almost surely, 2^51915673 is an apocalyptic number.

51915673 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51915673 is a deficient number, since it is larger than the sum of its proper divisors (979595).

51915673 is an equidigital number, since it uses as much as digits as its factorization.

51915673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979594.

The product of its digits is 28350, while the sum is 37.

The square root of 51915673 is about 7205.2531530821. The cubic root of 51915673 is about 373.0492427567.

The spelling of 51915673 in words is "fifty-one million, nine hundred fifteen thousand, six hundred seventy-three".