402012215 has 24 divisors (see below), whose sum is σ = 544619040. Its totient is φ = 284454720.

The previous prime is 402012179. The next prime is 402012223. The reversal of 402012215 is 512210204.

It is not a de Polignac number, because 402012215 - 2⁶ = 402012151 is a prime.

It is a super-2 number, since 2×402012215² = 323227642018412450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402012193 and 402012202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13406 + ... + 31364.

It is an arithmetic number, because the mean of its divisors is an integer number (22692460).

Almost surely, 2^402012215 is an apocalyptic number.

402012215 is a deficient number, since it is larger than the sum of its proper divisors (142606825).

402012215 is a wasteful number, since it uses less digits than its factorization.

402012215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18023 (or 18012 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 402012215 is about 20050.2422678630. The cubic root of 402012215 is about 738.0397443117.

Adding to 402012215 its reverse (512210204), we get a palindrome (914222419).

The spelling of 402012215 in words is "four hundred two million, twelve thousand, two hundred fifteen".