2661143100 has 144 divisors (see below), whose sum is σ = 9599552256. Its totient is φ = 552960000.

The previous prime is 2661143099. The next prime is 2661143101. The reversal of 2661143100 is 13411662.

2661143100 = 18235² + 18236² + ... + 18242².

It is an interprime number because it is at equal distance from previous prime (2661143099) and next prime (2661143101).

It is a super-2 number, since 2×2661143100² = 14163365197355220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661143101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34501 + ... + 80700.

Almost surely, 2^2661143100 is an apocalyptic number.

2661143100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661143100 is an abundant number, since it is smaller than the sum of its proper divisors (6938409156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661143100 is a wasteful number, since it uses less digits than its factorization.

2661143100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115236 (or 115229 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2661143100 is about 51586.2685217685. The cubic root of 2661143100 is about 1385.7644300617.

Adding to 2661143100 its reverse (13411662), we get a palindrome (2674554762).

The spelling of 2661143100 in words is "two billion, six hundred sixty-one million, one hundred forty-three thousand, one hundred".