51553031 has 16 divisors (see below), whose sum is σ = 55738368. Its totient is φ = 47582400.

The previous prime is 51553013. The next prime is 51553063. The reversal of 51553031 is 13035515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51553031 is a prime.

It is a super-2 number, since 2×51553031² = 5315430010573922, 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 = 51552988 and 51553006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553081) 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 15 ways as a sum of consecutive naturals, for example, 59306 + ... + 60168.

It is an arithmetic number, because the mean of its divisors is an integer number (3483648).

Almost surely, 2^51553031 is an apocalyptic number.

51553031 is a deficient number, since it is larger than the sum of its proper divisors (4185337).

51553031 is a wasteful number, since it uses less digits than its factorization.

51553031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 51553031 is about 7180.0439413697. The cubic root of 51553031 is about 372.1786030056.

Adding to 51553031 its reverse (13035515), we get a palindrome (64588546).

The spelling of 51553031 in words is "fifty-one million, five hundred fifty-three thousand, thirty-one".