40143351 has 4 divisors (see below), whose sum is σ = 53524472. Its totient is φ = 26762232.

The previous prime is 40143347. The next prime is 40143373. The reversal of 40143351 is 15334104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40143351 - 2² = 40143347 is a prime.

It is a super-2 number, since 2×40143351² = 3222977259018402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690556 + ... + 6690561.

It is an arithmetic number, because the mean of its divisors is an integer number (13381118).

Almost surely, 2^40143351 is an apocalyptic number.

40143351 is a deficient number, since it is larger than the sum of its proper divisors (13381121).

40143351 is a wasteful number, since it uses less digits than its factorization.

40143351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381120.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40143351 is about 6335.8780764784. The cubic root of 40143351 is about 342.4032468640.

Adding to 40143351 its reverse (15334104), we get a palindrome (55477455).

The spelling of 40143351 in words is "forty million, one hundred forty-three thousand, three hundred fifty-one".