40315121031 has 4 divisors (see below), whose sum is σ = 53753494712. Its totient is φ = 26876747352.

The previous prime is 40315120969. The next prime is 40315121047. The reversal of 40315121031 is 13012151304.

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

It is not a de Polignac number, because 40315121031 - 2⁷ = 40315120903 is a prime.

It is a super-2 number, since 2×40315121031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40315120989 and 40315121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40315120031) 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, 6719186836 + ... + 6719186841.

It is an arithmetic number, because the mean of its divisors is an integer number (13438373678).

Almost surely, 2^40315121031 is an apocalyptic number.

40315121031 is a deficient number, since it is larger than the sum of its proper divisors (13438373681).

40315121031 is a wasteful number, since it uses less digits than its factorization.

40315121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438373680.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 40315121031 its reverse (13012151304), we get a palindrome (53327272335).

The spelling of 40315121031 in words is "forty billion, three hundred fifteen million, one hundred twenty-one thousand, thirty-one".