4040121531 has 16 divisors (see below), whose sum is σ = 5562298368. Its totient is φ = 2605732800.

The previous prime is 4040121523. The next prime is 4040121539. The reversal of 4040121531 is 1351210404.

It is an interprime number because it is at equal distance from previous prime (4040121523) and next prime (4040121539).

It is not a de Polignac number, because 4040121531 - 2³ = 4040121523 is a prime.

It is a super-2 number, since 2×4040121531² = 32645163970499567922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4040121498 and 4040121507.

It is not an unprimeable number, because it can be changed into a prime (4040121539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536311 + ... + 543791.

It is an arithmetic number, because the mean of its divisors is an integer number (347643648).

Almost surely, 2^4040121531 is an apocalyptic number.

4040121531 is a deficient number, since it is larger than the sum of its proper divisors (1522176837).

4040121531 is a wasteful number, since it uses less digits than its factorization.

4040121531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 4040121531 is about 63561.9503398063. The cubic root of 4040121531 is about 1592.6908184425.

Adding to 4040121531 its reverse (1351210404), we get a palindrome (5391331935).

The spelling of 4040121531 in words is "four billion, forty million, one hundred twenty-one thousand, five hundred thirty-one".