381251051 has 4 divisors (see below), whose sum is σ = 393549504. Its totient is φ = 368952600.

The previous prime is 381251021. The next prime is 381251069. The reversal of 381251051 is 150152183.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150152183 = 6067 ⋅24749.

It is a cyclic number.

It is not a de Polignac number, because 381251051 - 2¹⁰ = 381250027 is a prime.

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 381251051.

It is not an unprimeable number, because it can be changed into a prime (381251011) 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, 6149180 + ... + 6149241.

It is an arithmetic number, because the mean of its divisors is an integer number (98387376).

Almost surely, 2^381251051 is an apocalyptic number.

381251051 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

381251051 is a deficient number, since it is larger than the sum of its proper divisors (12298453).

381251051 is a wasteful number, since it uses less digits than its factorization.

381251051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12298452.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 381251051 is about 19525.6511031002. The cubic root of 381251051 is about 725.1096471501.

The spelling of 381251051 in words is "three hundred eighty-one million, two hundred fifty-one thousand, fifty-one".