51405467 has 4 divisors (see below), whose sum is σ = 54429336. Its totient is φ = 48381600.

The previous prime is 51405463. The next prime is 51405479. The reversal of 51405467 is 76450415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76450415 = 5 ⋅15290083.

It is a cyclic number.

It is not a de Polignac number, because 51405467 - 2² = 51405463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51405463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511909 + ... + 1511942.

It is an arithmetic number, because the mean of its divisors is an integer number (13607334).

Almost surely, 2^51405467 is an apocalyptic number.

51405467 is a deficient number, since it is larger than the sum of its proper divisors (3023869).

51405467 is a wasteful number, since it uses less digits than its factorization.

51405467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023868.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 51405467 is about 7169.7605957242. The cubic root of 51405467 is about 371.8231590000.

The spelling of 51405467 in words is "fifty-one million, four hundred five thousand, four hundred sixty-seven".