2105311402 has 8 divisors (see below), whose sum is σ = 3158166276. Its totient is φ = 1052589312.

The previous prime is 2105311387. The next prime is 2105311409. The reversal of 2105311402 is 2041135012.

It can be written as a sum of positive squares in 2 ways, for example, as 1960806961 + 144504441 = 44281^2 + 12021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2105311402.

It is not an unprimeable number, because it can be changed into a prime (2105311409) 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, 32248 + ... + 72460.

Almost surely, 2^2105311402 is an apocalyptic number.

2105311402 is a deficient number, since it is larger than the sum of its proper divisors (1052854874).

2105311402 is a wasteful number, since it uses less digits than its factorization.

2105311402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66392.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2105311402 is about 45883.6724990492. The cubic root of 2105311402 is about 1281.6578863258.

Adding to 2105311402 its reverse (2041135012), we get a palindrome (4146446414).

The spelling of 2105311402 in words is "two billion, one hundred five million, three hundred eleven thousand, four hundred two".