101828261 has 4 divisors (see below), whose sum is σ = 102055500. Its totient is φ = 101601024.

The previous prime is 101828231. The next prime is 101828263. The reversal of 101828261 is 162828101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45292900 + 56535361 = 6730^2 + 7519^2 .

It is a cyclic number.

It is not a de Polignac number, because 101828261 - 2¹⁰ = 101827237 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 (101828263) 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, 112946 + ... + 113843.

It is an arithmetic number, because the mean of its divisors is an integer number (25513875).

Almost surely, 2^101828261 is an apocalyptic number.

It is an amenable number.

101828261 is a deficient number, since it is larger than the sum of its proper divisors (227239).

101828261 is an equidigital number, since it uses as much as digits as its factorization.

101828261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227238.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 101828261 is about 10090.9990090179. Note that the first 3 decimals coincide. The cubic root of 101828261 is about 466.9704964189.

The spelling of 101828261 in words is "one hundred one million, eight hundred twenty-eight thousand, two hundred sixty-one".