415220251 has 4 divisors (see below), whose sum is σ = 416836152. Its totient is φ = 413604352.

The previous prime is 415220227. The next prime is 415220269. The reversal of 415220251 is 152022514.

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 415220251 - 2⁷ = 415220123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (415220051) 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, 807565 + ... + 808078.

It is an arithmetic number, because the mean of its divisors is an integer number (104209038).

Almost surely, 2^415220251 is an apocalyptic number.

415220251 is a deficient number, since it is larger than the sum of its proper divisors (1615901).

415220251 is a wasteful number, since it uses less digits than its factorization.

415220251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615900.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 415220251 is about 20376.9539185816. The cubic root of 415220251 is about 746.0355258881.

Adding to 415220251 its reverse (152022514), we get a palindrome (567242765).

The spelling of 415220251 in words is "four hundred fifteen million, two hundred twenty thousand, two hundred fifty-one".