31801201045 has 64 divisors (see below), whose sum is σ = 44538937344. Its totient is φ = 21647324160.

The previous prime is 31801200979. The next prime is 31801201049. The reversal of 31801201045 is 54010210813.

It is not a de Polignac number, because 31801201045 - 2⁹ = 31801200533 is a prime.

It is a super-2 number, since 2×31801201045² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31801201049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2599914 + ... + 2612116.

It is an arithmetic number, because the mean of its divisors is an integer number (695920896).

Almost surely, 2^31801201045 is an apocalyptic number.

It is an amenable number.

31801201045 is a deficient number, since it is larger than the sum of its proper divisors (12737736299).

31801201045 is a wasteful number, since it uses less digits than its factorization.

31801201045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12322.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 31801201045 its reverse (54010210813), we get a palindrome (85811411858).

The spelling of 31801201045 in words is "thirty-one billion, eight hundred one million, two hundred one thousand, forty-five".