101543002261 has 4 divisors (see below), whose sum is σ = 102828356800. Its totient is φ = 100257647724.

The previous prime is 101543002229. The next prime is 101543002321. The reversal of 101543002261 is 162200345101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101543002261 - 2⁵ = 101543002229 is a prime.

It is a super-2 number, since 2×101543002261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101543002061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642677151 + ... + 642677308.

It is an arithmetic number, because the mean of its divisors is an integer number (25707089200).

Almost surely, 2^101543002261 is an apocalyptic number.

It is an amenable number.

101543002261 is a deficient number, since it is larger than the sum of its proper divisors (1285354539).

101543002261 is an equidigital number, since it uses as much as digits as its factorization.

101543002261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285354538.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 101543002261 its reverse (162200345101), we get a palindrome (263743347362).

The spelling of 101543002261 in words is "one hundred one billion, five hundred forty-three million, two thousand, two hundred sixty-one".