40197651 has 32 divisors (see below), whose sum is σ = 60137280. Its totient is φ = 23721984.

The previous prime is 40197601. The next prime is 40197713. The reversal of 40197651 is 15679104.

40197651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40197651 - 2⁶ = 40197587 is a prime.

It is a super-2 number, since 2×40197651² = 3231702291835602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40197601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128271 + ... + 128583.

It is an arithmetic number, because the mean of its divisors is an integer number (1879290).

Almost surely, 2^40197651 is an apocalyptic number.

40197651 is a deficient number, since it is larger than the sum of its proper divisors (19939629).

40197651 is a wasteful number, since it uses less digits than its factorization.

40197651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 40197651 is about 6340.1617487253. The cubic root of 40197651 is about 342.5575614978.

The spelling of 40197651 in words is "forty million, one hundred ninety-seven thousand, six hundred fifty-one".