402443101 has 4 divisors (see below), whose sum is σ = 402486304. Its totient is φ = 402399900.

The previous prime is 402443089. The next prime is 402443131. The reversal of 402443101 is 101344204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 402443101 - 2⁷ = 402442973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402443131) 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, 1215 + ... + 28396.

It is an arithmetic number, because the mean of its divisors is an integer number (100621576).

Almost surely, 2^402443101 is an apocalyptic number.

It is an amenable number.

402443101 is a deficient number, since it is larger than the sum of its proper divisors (43203).

402443101 is a wasteful number, since it uses less digits than its factorization.

402443101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43202.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 402443101 is about 20060.9845471253. The cubic root of 402443101 is about 738.3033328560.

Adding to 402443101 its reverse (101344204), we get a palindrome (503787305).

The spelling of 402443101 in words is "four hundred two million, four hundred forty-three thousand, one hundred one".