40781151 has 40 divisors (see below), whose sum is σ = 63888000. Its totient is φ = 25894080.

The previous prime is 40781131. The next prime is 40781159. The reversal of 40781151 is 15118704.

It is not a de Polignac number, because 40781151 - 2¹⁴ = 40764767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781159) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 273625 + ... + 273773.

It is an arithmetic number, because the mean of its divisors is an integer number (1597200).

Almost surely, 2^40781151 is an apocalyptic number.

40781151 is a deficient number, since it is larger than the sum of its proper divisors (23106849).

40781151 is a wasteful number, since it uses less digits than its factorization.

40781151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 40781151 is about 6386.0121359108. The cubic root of 40781151 is about 344.2071016076.

Adding to 40781151 its reverse (15118704), we get a palindrome (55899855).

The spelling of 40781151 in words is "forty million, seven hundred eighty-one thousand, one hundred fifty-one".