40312515021 has 32 divisors (see below), whose sum is σ = 58577453568. Its totient is φ = 24556815360.

The previous prime is 40312514969. The next prime is 40312515031. The reversal of 40312515021 is 12051521304.

It is a happy number.

It is not a de Polignac number, because 40312515021 - 2¹⁴ = 40312498637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40312514982 and 40312515000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40312515031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 850611 + ... + 896751.

It is an arithmetic number, because the mean of its divisors is an integer number (1830545424).

Almost surely, 2^40312515021 is an apocalyptic number.

It is an amenable number.

40312515021 is a deficient number, since it is larger than the sum of its proper divisors (18264938547).

40312515021 is a wasteful number, since it uses less digits than its factorization.

40312515021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46661.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 40312515021 in words is "forty billion, three hundred twelve million, five hundred fifteen thousand, twenty-one".