151873261 has 4 divisors (see below), whose sum is σ = 157110300. Its totient is φ = 146636224.

The previous prime is 151873237. The next prime is 151873277. The reversal of 151873261 is 162378151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162378151 = 13 ⋅12490627.

It can be written as a sum of positive squares in 2 ways, for example, as 47955625 + 103917636 = 6925^2 + 10194^2 .

It is a cyclic number.

It is not a de Polignac number, because 151873261 - 2²⁵ = 118318829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151873201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2618476 + ... + 2618533.

It is an arithmetic number, because the mean of its divisors is an integer number (39277575).

Almost surely, 2^151873261 is an apocalyptic number.

It is an amenable number.

151873261 is a deficient number, since it is larger than the sum of its proper divisors (5237039).

151873261 is an equidigital number, since it uses as much as digits as its factorization.

151873261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5237038.

The product of its digits is 10080, while the sum is 34.

The square root of 151873261 is about 12323.6869888845. The cubic root of 151873261 is about 533.5319593077.

The spelling of 151873261 in words is "one hundred fifty-one million, eight hundred seventy-three thousand, two hundred sixty-one".