2101458857 has 2 divisors, whose sum is σ = 2101458858. Its totient is φ = 2101458856.

The previous prime is 2101458829. The next prime is 2101458869. The reversal of 2101458857 is 7588541012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491813376 + 609645481 = 38624^2 + 24691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101458857 - 2¹⁰ = 2101457833 is a prime.

It is a super-2 number, since 2×2101458857² = 8832258655327492898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101451857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050729428 + 1050729429.

It is an arithmetic number, because the mean of its divisors is an integer number (1050729429).

Almost surely, 2^2101458857 is an apocalyptic number.

It is an amenable number.

2101458857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101458857 is an equidigital number, since it uses as much as digits as its factorization.

2101458857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 41.

The square root of 2101458857 is about 45841.6716209171. The cubic root of 2101458857 is about 1280.8756331527.

Adding to 2101458857 its reverse (7588541012), we get a palindrome (9689999869).

The spelling of 2101458857 in words is "two billion, one hundred one million, four hundred fifty-eight thousand, eight hundred fifty-seven".