1016210261 has 4 divisors (see below), whose sum is σ = 1108593024. Its totient is φ = 923827500.

The previous prime is 1016210249. The next prime is 1016210281. The reversal of 1016210261 is 1620126101.

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 1016210261 - 2¹⁴ = 1016193877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016210281) 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, 46191365 + ... + 46191386.

It is an arithmetic number, because the mean of its divisors is an integer number (277148256).

Almost surely, 2^1016210261 is an apocalyptic number.

1016210261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1016210261 is a deficient number, since it is larger than the sum of its proper divisors (92382763).

1016210261 is an equidigital number, since it uses as much as digits as its factorization.

1016210261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92382762.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1016210261 is about 31878.0529675198. The cubic root of 1016210261 is about 1005.3744835129.

Adding to 1016210261 its reverse (1620126101), we get a palindrome (2636336362).

The spelling of 1016210261 in words is "one billion, sixteen million, two hundred ten thousand, two hundred sixty-one".