378273531 has 16 divisors (see below), whose sum is σ = 515824128. Its totient is φ = 246468000.

The previous prime is 378273521. The next prime is 378273551. The reversal of 378273531 is 135372873.

It is a happy number.

It is not a de Polignac number, because 378273531 - 2⁵ = 378273499 is a prime.

It is a super-2 number, since 2×378273531² = 286181728510415922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 378273531.

It is not an unprimeable number, because it can be changed into a prime (378273521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131256 + ... + 134106.

It is an arithmetic number, because the mean of its divisors is an integer number (32239008).

Almost surely, 2^378273531 is an apocalyptic number.

378273531 is a deficient number, since it is larger than the sum of its proper divisors (137550597).

378273531 is a wasteful number, since it uses less digits than its factorization.

378273531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842.

The product of its digits is 105840, while the sum is 39.

The square root of 378273531 is about 19449.2552813726. The cubic root of 378273531 is about 723.2170415994.

The spelling of 378273531 in words is "three hundred seventy-eight million, two hundred seventy-three thousand, five hundred thirty-one".