1012331557 has 2 divisors, whose sum is σ = 1012331558. Its totient is φ = 1012331556.

The previous prime is 1012331531. The next prime is 1012331563. The reversal of 1012331557 is 7551332101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 898140961 + 114190596 = 29969^2 + 10686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012331557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012331357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506165778 + 506165779.

It is an arithmetic number, because the mean of its divisors is an integer number (506165779).

Almost surely, 2^1012331557 is an apocalyptic number.

It is an amenable number.

1012331557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012331557 is an equidigital number, since it uses as much as digits as its factorization.

1012331557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 1012331557 is about 31817.1582169118. The cubic root of 1012331557 is about 1004.0937374452.

Adding to 1012331557 its reverse (7551332101), we get a palindrome (8563663658).

The spelling of 1012331557 in words is "one billion, twelve million, three hundred thirty-one thousand, five hundred fifty-seven".