40125021500 has 24 divisors (see below), whose sum is σ = 87633048048. Its totient is φ = 16050008400.

The previous prime is 40125021491. The next prime is 40125021509. The reversal of 40125021500 is 512052104.

It is an interprime number because it is at equal distance from previous prime (40125021491) and next prime (40125021509).

It is a super-2 number, since 2×40125021500² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40125021509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40124522 + ... + 40125521.

It is an arithmetic number, because the mean of its divisors is an integer number (3651377002).

Almost surely, 2^40125021500 is an apocalyptic number.

It is an amenable number.

40125021500 is an abundant number, since it is smaller than the sum of its proper divisors (47508026548).

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

40125021500 is a wasteful number, since it uses less digits than its factorization.

40125021500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80250062 (or 80250050 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 40125021500 its reverse (512052104), we get a palindrome (40637073604).

The spelling of 40125021500 in words is "forty billion, one hundred twenty-five million, twenty-one thousand, five hundred".