51530467 has 4 divisors (see below), whose sum is σ = 52151400. Its totient is φ = 50909536.

The previous prime is 51530459. The next prime is 51530473. The reversal of 51530467 is 76403515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76403515 = 5 ⋅15280703.

It is a cyclic number.

It is not a de Polignac number, because 51530467 - 2³ = 51530459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51530867) 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, 310342 + ... + 310507.

It is an arithmetic number, because the mean of its divisors is an integer number (13037850).

Almost surely, 2^51530467 is an apocalyptic number.

51530467 is a deficient number, since it is larger than the sum of its proper divisors (620933).

51530467 is an equidigital number, since it uses as much as digits as its factorization.

51530467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620932.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 51530467 is about 7178.4724698225. The cubic root of 51530467 is about 372.1242960564.

The spelling of 51530467 in words is "fifty-one million, five hundred thirty thousand, four hundred sixty-seven".