40621215 has 16 divisors (see below), whose sum is σ = 65886048. Its totient is φ = 21367296.

The previous prime is 40621121. The next prime is 40621223. The reversal of 40621215 is 51212604.

It is not a de Polignac number, because 40621215 - 2¹² = 40617119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40621191 and 40621200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17454 + ... + 19643.

It is an arithmetic number, because the mean of its divisors is an integer number (4117878).

Almost surely, 2^40621215 is an apocalyptic number.

40621215 is a deficient number, since it is larger than the sum of its proper divisors (25264833).

40621215 is a wasteful number, since it uses less digits than its factorization.

40621215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37178.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 40621215 is about 6373.4774652461. The cubic root of 40621215 is about 343.7565402612.

Adding to 40621215 its reverse (51212604), we get a palindrome (91833819).

The spelling of 40621215 in words is "forty million, six hundred twenty-one thousand, two hundred fifteen".