1051002191 has 8 divisors (see below), whose sum is σ = 1064300160. Its totient is φ = 1037719512.

The previous prime is 1051002167. The next prime is 1051002193. The reversal of 1051002191 is 1912001501.

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

It is a cyclic number.

It is not a de Polignac number, because 1051002191 - 2¹⁰ = 1051001167 is a prime.

It is a super-4 number, since 4×1051002191⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051002193) 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, 205220 + ... + 210278.

It is an arithmetic number, because the mean of its divisors is an integer number (133037520).

Almost surely, 2^1051002191 is an apocalyptic number.

1051002191 is a deficient number, since it is larger than the sum of its proper divisors (13297969).

1051002191 is an equidigital number, since it uses as much as digits as its factorization.

1051002191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7645.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1051002191 is about 32419.1639466535. The cubic root of 1051002191 is about 1016.7196264568.

Adding to 1051002191 its reverse (1912001501), we get a palindrome (2963003692).

The spelling of 1051002191 in words is "one billion, fifty-one million, two thousand, one hundred ninety-one".