401111513731 has 4 divisors (see below), whose sum is σ = 401113701000. Its totient is φ = 401109326464.

The previous prime is 401111513729. The next prime is 401111513753. The reversal of 401111513731 is 137315111104.

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

It is a cyclic number.

It is not a de Polignac number, because 401111513731 - 2¹ = 401111513729 is a prime.

It is a super-2 number, since 2×401111513731² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401111513731.

It is not an unprimeable number, because it can be changed into a prime (401111513701) 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, 790561 + ... + 1194658.

It is an arithmetic number, because the mean of its divisors is an integer number (100278425250).

Almost surely, 2^401111513731 is an apocalyptic number.

401111513731 is a deficient number, since it is larger than the sum of its proper divisors (2187269).

401111513731 is a wasteful number, since it uses less digits than its factorization.

401111513731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187268.

The product of its (nonzero) digits is 1260, while the sum is 28.

Adding to 401111513731 its reverse (137315111104), we get a palindrome (538426624835).

The spelling of 401111513731 in words is "four hundred one billion, one hundred eleven million, five hundred thirteen thousand, seven hundred thirty-one".