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151381 is a prime number
BaseRepresentation
bin100100111101010101
321200122201
4210331111
514321011
63124501
71200226
oct447525
9250581
10151381
11a380a
1273731
1353b99
143d24d
152ecc1
hex24f55

151381 has 2 divisors, whose sum is σ = 151382. Its totient is φ = 151380.

The previous prime is 151379. The next prime is 151391. The reversal of 151381 is 183151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128881 + 22500 = 359^2 + 150^2 .

It is an emirp because it is prime and its reverse (183151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151381 - 21 = 151379 is a prime.

It is a super-2 number, since 2×1513812 = 45832414322, which contains 22 as substring.

Together with 151379, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75690 + 75691.

It is an arithmetic number, because the mean of its divisors is an integer number (75691).

2151381 is an apocalyptic number.

It is an amenable number.

151381 is a deficient number, since it is larger than the sum of its proper divisors (1).

151381 is an equidigital number, since it uses as much as digits as its factorization.

151381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 19.

The square root of 151381 is about 389.0771131794. The cubic root of 151381 is about 53.2954896467.

The spelling of 151381 in words is "one hundred fifty-one thousand, three hundred eighty-one".