100378131 has 16 divisors (see below), whose sum is σ = 155844864. Its totient is φ = 56276064.

The previous prime is 100378079. The next prime is 100378147. The reversal of 100378131 is 131873001.

It is not a de Polignac number, because 100378131 - 2¹³ = 100369939 is a prime.

It is a super-2 number, since 2×100378131² = 20151538366106322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100378631) 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, 43981 + ... + 46206.

It is an arithmetic number, because the mean of its divisors is an integer number (9740304).

Almost surely, 2^100378131 is an apocalyptic number.

100378131 is a deficient number, since it is larger than the sum of its proper divisors (55466733).

100378131 is an equidigital number, since it uses as much as digits as its factorization.

100378131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90250.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 100378131 is about 10018.8887108302. Note that the first 3 decimals coincide. The cubic root of 100378131 is about 464.7431903727.

The spelling of 100378131 in words is "one hundred million, three hundred seventy-eight thousand, one hundred thirty-one".