51259945 has 8 divisors (see below), whose sum is σ = 67104000. Its totient is φ = 37279920.

The previous prime is 51259931. The next prime is 51259951. The reversal of 51259945 is 54995215.

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

It is not a de Polignac number, because 51259945 - 2¹¹ = 51257897 is a prime.

It is a super-2 number, since 2×51259945² = 5255163922806050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51259898 and 51259907.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 465945 + ... + 466054.

It is an arithmetic number, because the mean of its divisors is an integer number (8388000).

Almost surely, 2^51259945 is an apocalyptic number.

51259945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51259945 is a deficient number, since it is larger than the sum of its proper divisors (15844055).

51259945 is a wasteful number, since it uses less digits than its factorization.

51259945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932015.

The product of its digits is 81000, while the sum is 40.

The square root of 51259945 is about 7159.6050868746. The cubic root of 51259945 is about 371.4719668585.

The spelling of 51259945 in words is "fifty-one million, two hundred fifty-nine thousand, nine hundred forty-five".