361420217 has 4 divisors (see below), whose sum is σ = 364618740. Its totient is φ = 358221696.

The previous prime is 361420193. The next prime is 361420219. The reversal of 361420217 is 712024163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712024163 = 41 ⋅17366443.

It can be written as a sum of positive squares in 2 ways, for example, as 110166016 + 251254201 = 10496^2 + 15851^2 .

It is a cyclic number.

It is not a de Polignac number, because 361420217 - 2¹⁰ = 361419193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361420219) 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, 1599092 + ... + 1599317.

It is an arithmetic number, because the mean of its divisors is an integer number (91154685).

Almost surely, 2^361420217 is an apocalyptic number.

It is an amenable number.

361420217 is a deficient number, since it is larger than the sum of its proper divisors (3198523).

361420217 is a wasteful number, since it uses less digits than its factorization.

361420217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198522.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 361420217 is about 19011.0551258998. The cubic root of 361420217 is about 712.3129075606.

The spelling of 361420217 in words is "three hundred sixty-one million, four hundred twenty thousand, two hundred seventeen".