51382357 has 4 divisors (see below), whose sum is σ = 55334860. Its totient is φ = 47429856.

The previous prime is 51382349. The next prime is 51382361. The reversal of 51382357 is 75328315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75328315 = 5 ⋅15065663.

It can be written as a sum of positive squares in 2 ways, for example, as 27185796 + 24196561 = 5214^2 + 4919^2 .

It is a cyclic number.

It is not a de Polignac number, because 51382357 - 2³ = 51382349 is a prime.

It is a super-2 number, since 2×51382357² = 5280293221750898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51382057) 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, 1976232 + ... + 1976257.

It is an arithmetic number, because the mean of its divisors is an integer number (13833715).

Almost surely, 2^51382357 is an apocalyptic number.

It is an amenable number.

51382357 is a deficient number, since it is larger than the sum of its proper divisors (3952503).

51382357 is a wasteful number, since it uses less digits than its factorization.

51382357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952502.

The product of its digits is 25200, while the sum is 34.

The square root of 51382357 is about 7168.1487847282. The cubic root of 51382357 is about 371.7674313267.

The spelling of 51382357 in words is "fifty-one million, three hundred eighty-two thousand, three hundred fifty-seven".