402071555 has 4 divisors (see below), whose sum is σ = 482485872. Its totient is φ = 321657240.

The previous prime is 402071531. The next prime is 402071561. The reversal of 402071555 is 555170204.

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

It is not a de Polignac number, because 402071555 - 2²⁴ = 385294339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40207151 + ... + 40207160.

It is an arithmetic number, because the mean of its divisors is an integer number (120621468).

Almost surely, 2^402071555 is an apocalyptic number.

402071555 is a deficient number, since it is larger than the sum of its proper divisors (80414317).

402071555 is an equidigital number, since it uses as much as digits as its factorization.

402071555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80414316.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 402071555 is about 20051.7219958786. The cubic root of 402071555 is about 738.0760559146.

The spelling of 402071555 in words is "four hundred two million, seventy-one thousand, five hundred fifty-five".