51202031 has 2 divisors, whose sum is σ = 51202032. Its totient is φ = 51202030.

The previous prime is 51202027. The next prime is 51202037. The reversal of 51202031 is 13020215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51202031 - 2² = 51202027 is a prime.

It is a super-2 number, since 2×51202031² = 5243295957049922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51201997 and 51202015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51202037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25601015 + 25601016.

It is an arithmetic number, because the mean of its divisors is an integer number (25601016).

Almost surely, 2^51202031 is an apocalyptic number.

51202031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51202031 is an equidigital number, since it uses as much as digits as its factorization.

51202031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51202031 is about 7155.5594470314. The cubic root of 51202031 is about 371.3320165548.

Adding to 51202031 its reverse (13020215), we get a palindrome (64222246).

The spelling of 51202031 in words is "fifty-one million, two hundred two thousand, thirty-one".