401630111 has 4 divisors (see below), whose sum is σ = 406469112. Its totient is φ = 396791112.

The previous prime is 401630107. The next prime is 401630123. The reversal of 401630111 is 111036104.

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 401630111 - 2² = 401630107 is a prime.

It is a super-2 number, since 2×401630111² = 322613492123744642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401630111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401630311) 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, 2419376 + ... + 2419541.

It is an arithmetic number, because the mean of its divisors is an integer number (101617278).

Almost surely, 2^401630111 is an apocalyptic number.

401630111 is a deficient number, since it is larger than the sum of its proper divisors (4839001).

401630111 is an equidigital number, since it uses as much as digits as its factorization.

401630111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839000.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 401630111 is about 20040.7113396706. The cubic root of 401630111 is about 737.8058398658.

Adding to 401630111 its reverse (111036104), we get a palindrome (512666215).

The spelling of 401630111 in words is "four hundred one million, six hundred thirty thousand, one hundred eleven".