151661101 has 4 divisors (see below), whose sum is σ = 152208892. Its totient is φ = 151113312.

The previous prime is 151661099. The next prime is 151661123. The reversal of 151661101 is 101166151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36120100 + 115541001 = 6010^2 + 10749^2 .

It is a cyclic number.

It is not a de Polignac number, because 151661101 - 2¹ = 151661099 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 (151661201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273480 + ... + 274033.

It is an arithmetic number, because the mean of its divisors is an integer number (38052223).

Almost surely, 2^151661101 is an apocalyptic number.

It is an amenable number.

151661101 is a deficient number, since it is larger than the sum of its proper divisors (547791).

151661101 is an equidigital number, since it uses as much as digits as its factorization.

151661101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547790.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 151661101 is about 12315.0761670401. The cubic root of 151661101 is about 533.2834036157.

The spelling of 151661101 in words is "one hundred fifty-one million, six hundred sixty-one thousand, one hundred one".