100051020557 has 2 divisors, whose sum is σ = 100051020558. Its totient is φ = 100051020556.

The previous prime is 100051020551. The next prime is 100051020611. The reversal of 100051020557 is 755020150001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65283316036 + 34767704521 = 255506^2 + 186461^2 .

It is a cyclic number.

It is not a de Polignac number, because 100051020557 - 2⁸ = 100051020301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100051020551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50025510278 + 50025510279.

It is an arithmetic number, because the mean of its divisors is an integer number (50025510279).

Almost surely, 2^100051020557 is an apocalyptic number.

It is an amenable number.

100051020557 is a deficient number, since it is larger than the sum of its proper divisors (1).

100051020557 is an equidigital number, since it uses as much as digits as its factorization.

100051020557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1750, while the sum is 26.

Adding to 100051020557 its reverse (755020150001), we get a palindrome (855071170558).

The spelling of 100051020557 in words is "one hundred billion, fifty-one million, twenty thousand, five hundred fifty-seven".