31144201402 has 4 divisors (see below), whose sum is σ = 46716302106. Its totient is φ = 15572100700.

The previous prime is 31144201393. The next prime is 31144201427. The reversal of 31144201402 is 20410244113.

It is a happy number.

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., 31138484521 + 5716881 = 176461^2 + 2391^2 .

It is a super-2 number, since 2×31144201402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7786050349 + ... + 7786050352.

Almost surely, 2^31144201402 is an apocalyptic number.

31144201402 is a deficient number, since it is larger than the sum of its proper divisors (15572100704).

31144201402 is a wasteful number, since it uses less digits than its factorization.

31144201402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15572100703.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31144201402 its reverse (20410244113), we get a palindrome (51554445515).

The spelling of 31144201402 in words is "thirty-one billion, one hundred forty-four million, two hundred one thousand, four hundred two".