51893145 has 24 divisors (see below), whose sum is σ = 91186056. Its totient is φ = 27295488.

The previous prime is 51893143. The next prime is 51893147. The reversal of 51893145 is 54139815.

It is an interprime number because it is at equal distance from previous prime (51893143) and next prime (51893147).

It can be written as a sum of positive squares in 4 ways, for example, as 10830681 + 41062464 = 3291^2 + 6408^2 .

It is not a de Polignac number, because 51893145 - 2¹ = 51893143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51893143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4614 + ... + 11183.

It is an arithmetic number, because the mean of its divisors is an integer number (3799419).

Almost surely, 2^51893145 is an apocalyptic number.

It is an amenable number.

51893145 is a deficient number, since it is larger than the sum of its proper divisors (39292911).

51893145 is a wasteful number, since it uses less digits than its factorization.

51893145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15881 (or 15878 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 51893145 is about 7203.6896796017. The cubic root of 51893145 is about 372.9952753081.

The spelling of 51893145 in words is "fifty-one million, eight hundred ninety-three thousand, one hundred forty-five".