151851691 has 2 divisors, whose sum is σ = 151851692. Its totient is φ = 151851690.

The previous prime is 151851653. The next prime is 151851703. The reversal of 151851691 is 196158151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 151851691 - 2⁷ = 151851563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151851691.

It is not a weakly prime, because it can be changed into another prime (151851641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75925845 + 75925846.

It is an arithmetic number, because the mean of its divisors is an integer number (75925846).

Almost surely, 2^151851691 is an apocalyptic number.

151851691 is a deficient number, since it is larger than the sum of its proper divisors (1).

151851691 is an equidigital number, since it uses as much as digits as its factorization.

151851691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 37.

The square root of 151851691 is about 12322.8118138678. The cubic root of 151851691 is about 533.5066995853.

The spelling of 151851691 in words is "one hundred fifty-one million, eight hundred fifty-one thousand, six hundred ninety-one".