2105771428 has 6 divisors (see below), whose sum is σ = 3685100006. Its totient is φ = 1052885712.

The previous prime is 2105771413. The next prime is 2105771443. The reversal of 2105771428 is 8241775012.

It is an interprime number because it is at equal distance from previous prime (2105771413) and next prime (2105771443).

It can be written as a sum of positive squares in only one way, i.e., 1241293824 + 864477604 = 35232^2 + 29402^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263221425 + ... + 263221432.

Almost surely, 2^2105771428 is an apocalyptic number.

It is an amenable number.

2105771428 is a deficient number, since it is larger than the sum of its proper divisors (1579328578).

2105771428 is a wasteful number, since it uses less digits than its factorization.

2105771428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526442861 (or 526442859 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 2105771428 is about 45888.6851849124. The cubic root of 2105771428 is about 1281.7512300804.

The spelling of 2105771428 in words is "two billion, one hundred five million, seven hundred seventy-one thousand, four hundred twenty-eight".