40721522 has 12 divisors (see below), whose sum is σ = 64467486. Its totient is φ = 19288800.

The previous prime is 40721521. The next prime is 40721531. The reversal of 40721522 is 22512704.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32706961 + 8014561 = 5719^2 + 2831^2 .

It is a super-3 number, since 3×40721522³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40721521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27479 + ... + 28922.

Almost surely, 2^40721522 is an apocalyptic number.

40721522 is a deficient number, since it is larger than the sum of its proper divisors (23745964).

40721522 is a wasteful number, since it uses less digits than its factorization.

40721522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56441 (or 56422 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 40721522 is about 6381.3417084497. The cubic root of 40721522 is about 344.0392566070.

The spelling of 40721522 in words is "forty million, seven hundred twenty-one thousand, five hundred twenty-two".