381297551 has 8 divisors (see below), whose sum is σ = 393874944. Its totient is φ = 368737560.

The previous prime is 381297541. The next prime is 381297557. The reversal of 381297551 is 155792183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381297551 - 2⁶ = 381297487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381297499 and 381297508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381297557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51956 + ... + 58838.

It is an arithmetic number, because the mean of its divisors is an integer number (49234368).

Almost surely, 2^381297551 is an apocalyptic number.

381297551 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

381297551 is a deficient number, since it is larger than the sum of its proper divisors (12577393).

381297551 is a wasteful number, since it uses less digits than its factorization.

381297551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701.

The product of its digits is 75600, while the sum is 41.

The square root of 381297551 is about 19526.8418081368. The cubic root of 381297551 is about 725.1391257380.

The spelling of 381297551 in words is "three hundred eighty-one million, two hundred ninety-seven thousand, five hundred fifty-one".