105215401 has 4 divisors (see below), whose sum is σ = 106018704. Its totient is φ = 104412100.

The previous prime is 105215399. The next prime is 105215419. The reversal of 105215401 is 104512501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104512501 = 31 ⋅3371371.

It is a cyclic number.

It is not a de Polignac number, because 105215401 - 2¹ = 105215399 is a prime.

It is a super-2 number, since 2×105215401² = 22140561215181602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105215491) 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, 401455 + ... + 401716.

It is an arithmetic number, because the mean of its divisors is an integer number (26504676).

Almost surely, 2^105215401 is an apocalyptic number.

It is an amenable number.

105215401 is a deficient number, since it is larger than the sum of its proper divisors (803303).

105215401 is an equidigital number, since it uses as much as digits as its factorization.

105215401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803302.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 105215401 is about 10257.4558736560. The cubic root of 105215401 is about 472.0917795885.

Adding to 105215401 its reverse (104512501), we get a palindrome (209727902).

The spelling of 105215401 in words is "one hundred five million, two hundred fifteen thousand, four hundred one".