401213615 has 12 divisors (see below), whose sum is σ = 529204872. Its totient is φ = 291791280.

The previous prime is 401213609. The next prime is 401213623. The reversal of 401213615 is 516312104.

It is not a de Polignac number, because 401213615 - 2⁴ = 401213599 is a prime.

It is a super-2 number, since 2×401213615² = 321944729722736450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330977 + ... + 332186.

It is an arithmetic number, because the mean of its divisors is an integer number (44100406).

Almost surely, 2^401213615 is an apocalyptic number.

401213615 is a deficient number, since it is larger than the sum of its proper divisors (127991257).

401213615 is a wasteful number, since it uses less digits than its factorization.

401213615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663190 (or 663179 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 401213615 is about 20030.3173963869. The cubic root of 401213615 is about 737.5507133565.

Adding to 401213615 its reverse (516312104), we get a palindrome (917525719).

The spelling of 401213615 in words is "four hundred one million, two hundred thirteen thousand, six hundred fifteen".