51825157 has 4 divisors (see below), whose sum is σ = 51906400. Its totient is φ = 51743916.

The previous prime is 51825131. The next prime is 51825181. The reversal of 51825157 is 75152815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75152815 = 5 ⋅15030563.

It is a cyclic number.

It is not a de Polignac number, because 51825157 - 2⁷ = 51825029 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 (51825127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39657 + ... + 40942.

It is an arithmetic number, because the mean of its divisors is an integer number (12976600).

Almost surely, 2^51825157 is an apocalyptic number.

It is an amenable number.

51825157 is a deficient number, since it is larger than the sum of its proper divisors (81243).

51825157 is an equidigital number, since it uses as much as digits as its factorization.

51825157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81242.

The product of its digits is 14000, while the sum is 34.

The square root of 51825157 is about 7198.9691623176. The cubic root of 51825157 is about 372.8323103946.

The spelling of 51825157 in words is "fifty-one million, eight hundred twenty-five thousand, one hundred fifty-seven".