40155403 has 2 divisors, whose sum is σ = 40155404. Its totient is φ = 40155402.

The previous prime is 40155389. The next prime is 40155407. The reversal of 40155403 is 30455104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40155403 is a prime.

It is a super-2 number, since 2×40155403² = 3224912780184818, which contains 22 as substring.

It is equal to p_2442541 and since 40155403 and 2442541 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40155407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077701 + 20077702.

It is an arithmetic number, because the mean of its divisors is an integer number (20077702).

Almost surely, 2^40155403 is an apocalyptic number.

40155403 is a deficient number, since it is larger than the sum of its proper divisors (1).

40155403 is an equidigital number, since it uses as much as digits as its factorization.

40155403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40155403 is about 6336.8290966382. The cubic root of 40155403 is about 342.4375093335.

The spelling of 40155403 in words is "forty million, one hundred fifty-five thousand, four hundred three".