151215261 has 4 divisors (see below), whose sum is σ = 201620352. Its totient is φ = 100810172.

The previous prime is 151215191. The next prime is 151215287. The reversal of 151215261 is 162512151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151215261 - 2¹⁰ = 151214237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151215461) 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 in 3 ways as a sum of consecutive naturals, for example, 25202541 + ... + 25202546.

It is an arithmetic number, because the mean of its divisors is an integer number (50405088).

Almost surely, 2^151215261 is an apocalyptic number.

It is an amenable number.

151215261 is a deficient number, since it is larger than the sum of its proper divisors (50405091).

151215261 is an equidigital number, since it uses as much as digits as its factorization.

151215261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50405090.

The product of its digits is 600, while the sum is 24.

The square root of 151215261 is about 12296.9614539528. The cubic root of 151215261 is about 532.7603241237.

The spelling of 151215261 in words is "one hundred fifty-one million, two hundred fifteen thousand, two hundred sixty-one".