40231512 has 64 divisors (see below), whose sum is σ = 117648000. Its totient is φ = 12703392.

The previous prime is 40231501. The next prime is 40231519. The reversal of 40231512 is 21513204.

It is a super-2 number, since 2×40231512² = 3237149115612288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231519) 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, 798 + ... + 9005.

It is an arithmetic number, because the mean of its divisors is an integer number (1838250).

Almost surely, 2^40231512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40231512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58824000).

40231512 is an abundant number, since it is smaller than the sum of its proper divisors (77416488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40231512 is a wasteful number, since it uses less digits than its factorization.

40231512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9837 (or 9827 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40231512 is about 6342.8315443499. The cubic root of 40231512 is about 342.6537204016.

Adding to 40231512 its reverse (21513204), we get a palindrome (61744716).

The spelling of 40231512 in words is "forty million, two hundred thirty-one thousand, five hundred twelve".