40221351 has 12 divisors (see below), whose sum is σ = 58237920. Its totient is φ = 26749440.

The previous prime is 40221343. The next prime is 40221361. The reversal of 40221351 is 15312204.

40221351 = 64² + 65² + ... + 494².

40221351 is a `hidden beast` number, since 402 + 213 + 51 = 666.

It is not a de Polignac number, because 40221351 - 2³ = 40221343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221301) 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, 1306 + ... + 9063.

It is an arithmetic number, because the mean of its divisors is an integer number (4853160).

Almost surely, 2^40221351 is an apocalyptic number.

40221351 is a deficient number, since it is larger than the sum of its proper divisors (18016569).

40221351 is a wasteful number, since it uses less digits than its factorization.

40221351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806 (or 10803 counting only the distinct ones).

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

The square root of 40221351 is about 6342.0305108065. The cubic root of 40221351 is about 342.6248707310.

Adding to 40221351 its reverse (15312204), we get a palindrome (55533555).

The spelling of 40221351 in words is "forty million, two hundred twenty-one thousand, three hundred fifty-one".