106251891 has 4 divisors (see below), whose sum is σ = 141669192. Its totient is φ = 70834592.

The previous prime is 106251877. The next prime is 106251907. The reversal of 106251891 is 198152601.

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

It is a cyclic number.

It is not a de Polignac number, because 106251891 - 2¹³ = 106243699 is a prime.

It is a super-2 number, since 2×106251891² = 22578928682151762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106251841) 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, 17708646 + ... + 17708651.

It is an arithmetic number, because the mean of its divisors is an integer number (35417298).

Almost surely, 2^106251891 is an apocalyptic number.

106251891 is a deficient number, since it is larger than the sum of its proper divisors (35417301).

106251891 is an equidigital number, since it uses as much as digits as its factorization.

106251891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35417300.

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 106251891 is about 10307.8557906094. The cubic root of 106251891 is about 473.6369284339.

The spelling of 106251891 in words is "one hundred six million, two hundred fifty-one thousand, eight hundred ninety-one".