151242991 has 2 divisors, whose sum is σ = 151242992. Its totient is φ = 151242990.

The previous prime is 151242979. The next prime is 151243061. The reversal of 151242991 is 199242151.

151242991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151242991 - 2¹⁹ = 150718703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151242941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75621495 + 75621496.

It is an arithmetic number, because the mean of its divisors is an integer number (75621496).

Almost surely, 2^151242991 is an apocalyptic number.

151242991 is a deficient number, since it is larger than the sum of its proper divisors (1).

151242991 is an equidigital number, since it uses as much as digits as its factorization.

151242991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 151242991 is about 12298.0889165756. The cubic root of 151242991 is about 532.7928881668.

The spelling of 151242991 in words is "one hundred fifty-one million, two hundred forty-two thousand, nine hundred ninety-one".