151837781 has 2 divisors, whose sum is σ = 151837782. Its totient is φ = 151837780.

The previous prime is 151837769. The next prime is 151837787. The reversal of 151837781 is 187738151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148474225 + 3363556 = 12185^2 + 1834^2 .

It is a cyclic number.

It is not a de Polignac number, because 151837781 - 2⁶ = 151837717 is a prime.

It is a super-2 number, since 2×151837781² = 46109423478007922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151837787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75918890 + 75918891.

It is an arithmetic number, because the mean of its divisors is an integer number (75918891).

Almost surely, 2^151837781 is an apocalyptic number.

It is an amenable number.

151837781 is a deficient number, since it is larger than the sum of its proper divisors (1).

151837781 is an equidigital number, since it uses as much as digits as its factorization.

151837781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 41.

The square root of 151837781 is about 12322.2474005353. The cubic root of 151837781 is about 533.4904088990.

The spelling of 151837781 in words is "one hundred fifty-one million, eight hundred thirty-seven thousand, seven hundred eighty-one".