51275345 has 16 divisors (see below), whose sum is σ = 67979520. Its totient is φ = 36816000.

The previous prime is 51275291. The next prime is 51275353. The reversal of 51275345 is 54357215.

It is not a de Polignac number, because 51275345 - 2¹⁸ = 51013201 is a prime.

It is a super-2 number, since 2×51275345² = 5258322009738050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1556 + ... + 10245.

It is an arithmetic number, because the mean of its divisors is an integer number (4248720).

Almost surely, 2^51275345 is an apocalyptic number.

51275345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51275345 is a deficient number, since it is larger than the sum of its proper divisors (16704175).

51275345 is a wasteful number, since it uses less digits than its factorization.

51275345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11896.

The product of its digits is 21000, while the sum is 32.

The square root of 51275345 is about 7160.6804844233. The cubic root of 51275345 is about 371.5091635137.

It can be divided in two parts, 512 and 75345, that added together give a palindrome (75857).

The spelling of 51275345 in words is "fifty-one million, two hundred seventy-five thousand, three hundred forty-five".