31001040442 has 4 divisors (see below), whose sum is σ = 46501560666. Its totient is φ = 15500520220.

The previous prime is 31001040439. The next prime is 31001040449. The reversal of 31001040442 is 24404010013.

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., 24799635441 + 6201405001 = 157479^2 + 78749^2 .

It is a super-2 number, since 2×31001040442² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31001040449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750260109 + ... + 7750260112.

Almost surely, 2^31001040442 is an apocalyptic number.

31001040442 is a deficient number, since it is larger than the sum of its proper divisors (15500520224).

31001040442 is a wasteful number, since it uses less digits than its factorization.

31001040442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15500520223.

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

Adding to 31001040442 its reverse (24404010013), we get a palindrome (55405050455).

The spelling of 31001040442 in words is "thirty-one billion, one million, forty thousand, four hundred forty-two".