51623605 has 8 divisors (see below), whose sum is σ = 67580064. Its totient is φ = 37544400.

The previous prime is 51623597. The next prime is 51623609. The reversal of 51623605 is 50632615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51623605 - 2³ = 51623597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51623609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469251 + ... + 469360.

It is an arithmetic number, because the mean of its divisors is an integer number (8447508).

Almost surely, 2^51623605 is an apocalyptic number.

51623605 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51623605 is a deficient number, since it is larger than the sum of its proper divisors (15956459).

51623605 is a wasteful number, since it uses less digits than its factorization.

51623605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938627.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 51623605 is about 7184.9568544286. The cubic root of 51623605 is about 372.3483580169.

The spelling of 51623605 in words is "fifty-one million, six hundred twenty-three thousand, six hundred five".