211042402 has 4 divisors (see below), whose sum is σ = 316563606. Its totient is φ = 105521200.

The previous prime is 211042397. The next prime is 211042427. The reversal of 211042402 is 204240112.

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

It can be written as a sum of positive squares in only one way, i.e., 199063881 + 11978521 = 14109^2 + 3461^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52760599 + ... + 52760602.

Almost surely, 2^211042402 is an apocalyptic number.

211042402 is a deficient number, since it is larger than the sum of its proper divisors (105521204).

211042402 is a wasteful number, since it uses less digits than its factorization.

211042402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105521203.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 211042402 is about 14527.2985100465. The cubic root of 211042402 is about 595.3740575686.

Adding to 211042402 its reverse (204240112), we get a palindrome (415282514).

The spelling of 211042402 in words is "two hundred eleven million, forty-two thousand, four hundred two".