378531131 has 4 divisors (see below), whose sum is σ = 412943064. Its totient is φ = 344119200.

The previous prime is 378531103. The next prime is 378531149. The reversal of 378531131 is 131135873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131135873 = 11 ⋅11921443.

It is a cyclic number.

It is not a de Polignac number, because 378531131 - 2⁶ = 378531067 is a prime.

It is a super-2 number, since 2×378531131² = 286571634272278322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378531031) 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, 17205950 + ... + 17205971.

It is an arithmetic number, because the mean of its divisors is an integer number (103235766).

Almost surely, 2^378531131 is an apocalyptic number.

378531131 is a deficient number, since it is larger than the sum of its proper divisors (34411933).

378531131 is a wasteful number, since it uses less digits than its factorization.

378531131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34411932.

The product of its digits is 7560, while the sum is 32.

The square root of 378531131 is about 19455.8765158499. The cubic root of 378531131 is about 723.3811718923.

The spelling of 378531131 in words is "three hundred seventy-eight million, five hundred thirty-one thousand, one hundred thirty-one".