2100423257 has 2 divisors, whose sum is σ = 2100423258. Its totient is φ = 2100423256.

The previous prime is 2100423211. The next prime is 2100423307. The reversal of 2100423257 is 7523240012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2062613056 + 37810201 = 45416^2 + 6149^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100423257 - 2³⁰ = 1026681433 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100422257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050211628 + 1050211629.

It is an arithmetic number, because the mean of its divisors is an integer number (1050211629).

Almost surely, 2^2100423257 is an apocalyptic number.

It is an amenable number.

2100423257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100423257 is an equidigital number, since it uses as much as digits as its factorization.

2100423257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 2100423257 is about 45830.3748293640. The cubic root of 2100423257 is about 1280.6651931915.

Adding to 2100423257 its reverse (7523240012), we get a palindrome (9623663269).

The spelling of 2100423257 in words is "two billion, one hundred million, four hundred twenty-three thousand, two hundred fifty-seven".