2100611557 has 8 divisors (see below), whose sum is σ = 2412185760. Its totient is φ = 1809138960.

The previous prime is 2100611543. The next prime is 2100611587. The reversal of 2100611557 is 7551160012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2100611557 - 2²³ = 2092222949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100611587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5025178 + ... + 5025595.

It is an arithmetic number, because the mean of its divisors is an integer number (301523220).

Almost surely, 2^2100611557 is an apocalyptic number.

It is an amenable number.

2100611557 is a deficient number, since it is larger than the sum of its proper divisors (311574203).

2100611557 is a wasteful number, since it uses less digits than its factorization.

2100611557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050803.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 2100611557 is about 45832.4290977469. The cubic root of 2100611557 is about 1280.7034619943.

Adding to 2100611557 its reverse (7551160012), we get a palindrome (9651771569).

The spelling of 2100611557 in words is "two billion, one hundred million, six hundred eleven thousand, five hundred fifty-seven".