51152531 has 4 divisors (see below), whose sum is σ = 51243000. Its totient is φ = 51062064.

The previous prime is 51152513. The next prime is 51152551. The reversal of 51152531 is 13525115.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51152531 - 2¹⁸ = 50890387 is a prime.

It is a super-2 number, since 2×51152531² = 5233162855411922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51152497 and 51152506.

It is not an unprimeable number, because it can be changed into a prime (51152551) 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, 44381 + ... + 45518.

It is an arithmetic number, because the mean of its divisors is an integer number (12810750).

Almost surely, 2^51152531 is an apocalyptic number.

51152531 is a deficient number, since it is larger than the sum of its proper divisors (90469).

51152531 is an equidigital number, since it uses as much as digits as its factorization.

51152531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90468.

The product of its digits is 750, while the sum is 23.

The square root of 51152531 is about 7152.0997616085. The cubic root of 51152531 is about 371.2123151748.

Adding to 51152531 its reverse (13525115), we get a palindrome (64677646).

The spelling of 51152531 in words is "fifty-one million, one hundred fifty-two thousand, five hundred thirty-one".