401248221 has 48 divisors (see below), whose sum is σ = 613476864. Its totient is φ = 232848000.

The previous prime is 401248217. The next prime is 401248247. The reversal of 401248221 is 122842104.

It is not a de Polignac number, because 401248221 - 2² = 401248217 is a prime.

It is a super-2 number, since 2×401248221² = 322000269711329682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401248191 and 401248200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401243221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2036695 + ... + 2036891.

It is an arithmetic number, because the mean of its divisors is an integer number (12780768).

Almost surely, 2^401248221 is an apocalyptic number.

It is an amenable number.

401248221 is a deficient number, since it is larger than the sum of its proper divisors (212228643).

401248221 is a wasteful number, since it uses less digits than its factorization.

401248221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 401248221 is about 20031.1812182906. The cubic root of 401248221 is about 737.5719181422.

The spelling of 401248221 in words is "four hundred one million, two hundred forty-eight thousand, two hundred twenty-one".