51852397 has 4 divisors (see below), whose sum is σ = 54902556. Its totient is φ = 48802240.

The previous prime is 51852389. The next prime is 51852403. The reversal of 51852397 is 79325815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34035556 + 17816841 = 5834^2 + 4221^2 .

It is not a de Polignac number, because 51852397 - 2³ = 51852389 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 (51852347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525054 + ... + 1525087.

It is an arithmetic number, because the mean of its divisors is an integer number (13725639).

Almost surely, 2^51852397 is an apocalyptic number.

It is an amenable number.

51852397 is a deficient number, since it is larger than the sum of its proper divisors (3050159).

51852397 is a wasteful number, since it uses less digits than its factorization.

51852397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050158.

The product of its digits is 75600, while the sum is 40.

The square root of 51852397 is about 7200.8608513149. The cubic root of 51852397 is about 372.8976208466.

The spelling of 51852397 in words is "fifty-one million, eight hundred fifty-two thousand, three hundred ninety-seven".