51070531 has 2 divisors, whose sum is σ = 51070532. Its totient is φ = 51070530.

The previous prime is 51070517. The next prime is 51070553. The reversal of 51070531 is 13507015.

It is an a-pointer prime, because the next prime (51070553) can be obtained adding 51070531 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51070531 - 2¹¹ = 51068483 is a prime.

It is a super-2 number, since 2×51070531² = 5216398273243922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51070561) 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 as a sum of consecutive naturals, namely, 25535265 + 25535266.

It is an arithmetic number, because the mean of its divisors is an integer number (25535266).

Almost surely, 2^51070531 is an apocalyptic number.

51070531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51070531 is an equidigital number, since it uses as much as digits as its factorization.

51070531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 51070531 is about 7146.3648801331. The cubic root of 51070531 is about 371.0138519444.

Adding to 51070531 its reverse (13507015), we get a palindrome (64577546).

The spelling of 51070531 in words is "fifty-one million, seventy thousand, five hundred thirty-one".