105072251 has 4 divisors (see below), whose sum is σ = 105131712. Its totient is φ = 105012792.

The previous prime is 105072221. The next prime is 105072301. The reversal of 105072251 is 152270501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152270501 = 277 ⋅549713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105072251 is a prime.

It is a super-2 number, since 2×105072251² = 22080355860414002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105072221) 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, 26996 + ... + 30641.

It is an arithmetic number, because the mean of its divisors is an integer number (26282928).

Almost surely, 2^105072251 is an apocalyptic number.

105072251 is a deficient number, since it is larger than the sum of its proper divisors (59461).

105072251 is an equidigital number, since it uses as much as digits as its factorization.

105072251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59460.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 105072251 is about 10250.4756475005. The cubic root of 105072251 is about 471.8775821445.

The spelling of 105072251 in words is "one hundred five million, seventy-two thousand, two hundred fifty-one".