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2257381 = 72232003
BaseRepresentation
bin1000100111000111100101
311020200112201
420213013211
51034214011
6120214501
725121200
oct10470745
94220481
102257381
111302005
1290a431
13610639
1442a937
152e8cc1
hex2271e5

2257381 has 12 divisors (see below), whose sum is σ = 2741472. Its totient is φ = 1849848.

The previous prime is 2257373. The next prime is 2257391. The reversal of 2257381 is 1837522.

2257381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2257381 - 23 = 2257373 is a prime.

It is a super-2 number, since 2×22573812 = 10191537958322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126 + ... + 2128.

It is an arithmetic number, because the mean of its divisors is an integer number (228456).

22257381 is an apocalyptic number.

It is an amenable number.

2257381 is a deficient number, since it is larger than the sum of its proper divisors (484091).

2257381 is a wasteful number, since it uses less digits than its factorization.

2257381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2033 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 2257381 is about 1502.4583188894. The cubic root of 2257381 is about 131.1801999232.

The spelling of 2257381 in words is "two million, two hundred fifty-seven thousand, three hundred eighty-one".

Divisors: 1 7 23 49 161 1127 2003 14021 46069 98147 322483 2257381