51285345 has 16 divisors (see below), whose sum is σ = 86883840. Its totient is φ = 25743104.

The previous prime is 51285343. The next prime is 51285361. The reversal of 51285345 is 54358215.

It is a cyclic number.

It is not a de Polignac number, because 51285345 - 2¹ = 51285343 is a prime.

It is a super-2 number, since 2×51285345² = 5260373223538050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51285343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100305 + ... + 100814.

It is an arithmetic number, because the mean of its divisors is an integer number (5430240).

Almost surely, 2^51285345 is an apocalyptic number.

It is an amenable number.

51285345 is a deficient number, since it is larger than the sum of its proper divisors (35598495).

51285345 is a wasteful number, since it uses less digits than its factorization.

51285345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201144.

The product of its digits is 24000, while the sum is 33.

The square root of 51285345 is about 7161.3787080422. The cubic root of 51285345 is about 371.5333131977.

The spelling of 51285345 in words is "fifty-one million, two hundred eighty-five thousand, three hundred forty-five".