402254531 has 4 divisors (see below), whose sum is σ = 459719472. Its totient is φ = 344789592.

The previous prime is 402254509. The next prime is 402254537. The reversal of 402254531 is 135452204.

It is a happy number.

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

It is not a de Polignac number, because 402254531 - 2²² = 398060227 is a prime.

It is a super-2 number, since 2×402254531² = 323617415420059922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402254531.

It is not an unprimeable number, because it can be changed into a prime (402254537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28732460 + ... + 28732473.

It is an arithmetic number, because the mean of its divisors is an integer number (114929868).

Almost surely, 2^402254531 is an apocalyptic number.

402254531 is a deficient number, since it is larger than the sum of its proper divisors (57464941).

402254531 is an equidigital number, since it uses as much as digits as its factorization.

402254531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57464940.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 402254531 is about 20056.2840775653. The cubic root of 402254531 is about 738.1880009333.

The spelling of 402254531 in words is "four hundred two million, two hundred fifty-four thousand, five hundred thirty-one".