151821379 has 2 divisors, whose sum is σ = 151821380. Its totient is φ = 151821378.

The previous prime is 151821377. The next prime is 151821427. The reversal of 151821379 is 973128151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151821379 - 2¹ = 151821377 is a prime.

It is a super-2 number, since 2×151821379² = 46099462242923282, which contains 22 as substring.

Together with 151821377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (151821377) 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 as a sum of consecutive naturals, namely, 75910689 + 75910690.

It is an arithmetic number, because the mean of its divisors is an integer number (75910690).

Almost surely, 2^151821379 is an apocalyptic number.

151821379 is a deficient number, since it is larger than the sum of its proper divisors (1).

151821379 is an equidigital number, since it uses as much as digits as its factorization.

151821379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The square root of 151821379 is about 12321.5818383842. The cubic root of 151821379 is about 533.4711984304.

It can be divided in two parts, 15182 and 1379, that added together give a palindrome (16561).

The spelling of 151821379 in words is "one hundred fifty-one million, eight hundred twenty-one thousand, three hundred seventy-nine".