40821263 has 12 divisors (see below), whose sum is σ = 47927880. Its totient is φ = 34664112.

The previous prime is 40821259. The next prime is 40821307. The reversal of 40821263 is 36212804.

It is not a de Polignac number, because 40821263 - 2² = 40821259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40821223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1520 + ... + 9162.

It is an arithmetic number, because the mean of its divisors is an integer number (3993990).

Almost surely, 2^40821263 is an apocalyptic number.

40821263 is a deficient number, since it is larger than the sum of its proper divisors (7106617).

40821263 is a wasteful number, since it uses less digits than its factorization.

40821263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766 (or 7759 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 40821263 is about 6389.1519781580. The cubic root of 40821263 is about 344.3199177055.

The spelling of 40821263 in words is "forty million, eight hundred twenty-one thousand, two hundred sixty-three".