40002051 has 4 divisors (see below), whose sum is σ = 53336072. Its totient is φ = 26668032.

The previous prime is 40002043. The next prime is 40002073. The reversal of 40002051 is 15020004.

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

It is not a de Polignac number, because 40002051 - 2³ = 40002043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40002041) 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, 6667006 + ... + 6667011.

It is an arithmetic number, because the mean of its divisors is an integer number (13334018).

Almost surely, 2^40002051 is an apocalyptic number.

40002051 is a deficient number, since it is larger than the sum of its proper divisors (13334021).

40002051 is a wasteful number, since it uses less digits than its factorization.

40002051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13334020.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 40002051 is about 6324.7174640453. The cubic root of 40002051 is about 342.0010345032.

Adding to 40002051 its reverse (15020004), we get a palindrome (55022055).

It can be divided in two parts, 4000205 and 1, that added together give a triangular number (4000206 = T₂₈₂₈).

The spelling of 40002051 in words is "forty million, two thousand, fifty-one".