40156003 has 4 divisors (see below), whose sum is σ = 40472320. Its totient is φ = 39839688.

The previous prime is 40155991. The next prime is 40156013. The reversal of 40156003 is 30065104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40156003 is a prime.

It is a super-2 number, since 2×40156003² = 3225009153872018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40156013) 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, 157968 + ... + 158221.

It is an arithmetic number, because the mean of its divisors is an integer number (10118080).

Almost surely, 2^40156003 is an apocalyptic number.

40156003 is a deficient number, since it is larger than the sum of its proper divisors (316317).

40156003 is a wasteful number, since it uses less digits than its factorization.

40156003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316316.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40156003 is about 6336.8764387512. The cubic root of 40156003 is about 342.4392148864.

The spelling of 40156003 in words is "forty million, one hundred fifty-six thousand, three".