402051311 has 4 divisors (see below), whose sum is σ = 408865800. Its totient is φ = 395236824.

The previous prime is 402051271. The next prime is 402051329. The reversal of 402051311 is 113150204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402051311 is a prime.

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 402051311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402056311) 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, 3407156 + ... + 3407273.

It is an arithmetic number, because the mean of its divisors is an integer number (102216450).

Almost surely, 2^402051311 is an apocalyptic number.

402051311 is a deficient number, since it is larger than the sum of its proper divisors (6814489).

402051311 is an equidigital number, since it uses as much as digits as its factorization.

402051311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814488.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 402051311 is about 20051.2171949735. The cubic root of 402051311 is about 738.0636685155.

The spelling of 402051311 in words is "four hundred two million, fifty-one thousand, three hundred eleven".