151661511 has 8 divisors (see below), whose sum is σ = 224683760. Its totient is φ = 101107656.

The previous prime is 151661491. The next prime is 151661533. The reversal of 151661511 is 115166151.

It is not a de Polignac number, because 151661511 - 2¹³ = 151653319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5617093 = 151661511 / (1 + 5 + 1 + 6 + 6 + 1 + 5 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151661711) 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 7 ways as a sum of consecutive naturals, for example, 2808520 + ... + 2808573.

It is an arithmetic number, because the mean of its divisors is an integer number (28085470).

Almost surely, 2^151661511 is an apocalyptic number.

151661511 is a deficient number, since it is larger than the sum of its proper divisors (73022249).

151661511 is an equidigital number, since it uses as much as digits as its factorization.

151661511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617102 (or 5617096 counting only the distinct ones).

The product of its digits is 900, while the sum is 27.

The square root of 151661511 is about 12315.0928132922. The cubic root of 151661511 is about 533.2838841740.

The spelling of 151661511 in words is "one hundred fifty-one million, six hundred sixty-one thousand, five hundred eleven".