51051531 has 8 divisors (see below), whose sum is σ = 68129680. Its totient is φ = 34003872.

The previous prime is 51051523. The next prime is 51051547. The reversal of 51051531 is 13515015.

51051531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51051531 - 2³ = 51051523 is a prime.

It is a super-2 number, since 2×51051531² = 5212517634887922, 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 = 51051498 and 51051507.

It is not an unprimeable number, because it can be changed into a prime (51051631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3376 + ... + 10653.

It is an arithmetic number, because the mean of its divisors is an integer number (8516210).

Almost surely, 2^51051531 is an apocalyptic number.

51051531 is a deficient number, since it is larger than the sum of its proper divisors (17078149).

51051531 is a wasteful number, since it uses less digits than its factorization.

51051531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15245.

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 51051531 is about 7145.0354092894. The cubic root of 51051531 is about 370.9678362519.

Adding to 51051531 its reverse (13515015), we get a palindrome (64566546).

The spelling of 51051531 in words is "fifty-one million, fifty-one thousand, five hundred thirty-one".