1012557551 has 2 divisors, whose sum is σ = 1012557552. Its totient is φ = 1012557550.

The previous prime is 1012557521. The next prime is 1012557617. The reversal of 1012557551 is 1557552101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012557551 - 2⁶ = 1012557487 is a prime.

It is a super-3 number, since 3×1012557551³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012557521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506278775 + 506278776.

It is an arithmetic number, because the mean of its divisors is an integer number (506278776).

Almost surely, 2^1012557551 is an apocalyptic number.

1012557551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012557551 is an equidigital number, since it uses as much as digits as its factorization.

1012557551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8750, while the sum is 32.

The square root of 1012557551 is about 31820.7094672636. The cubic root of 1012557551 is about 1004.1684502125.

It can be divided in two parts, 10125 and 57551, that added together give a palindrome (67676).

The spelling of 1012557551 in words is "one billion, twelve million, five hundred fifty-seven thousand, five hundred fifty-one".