151561841 has 4 divisors (see below), whose sum is σ = 159538800. Its totient is φ = 143584884.

The previous prime is 151561831. The next prime is 151561843. The reversal of 151561841 is 148165151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 148165151 = 31 ⋅4779521.

It is a cyclic number.

It is not a de Polignac number, because 151561841 - 2²² = 147367537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 151561798 and 151561807.

It is not an unprimeable number, because it can be changed into a prime (151561843) 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, 3988451 + ... + 3988488.

It is an arithmetic number, because the mean of its divisors is an integer number (39884700).

Almost surely, 2^151561841 is an apocalyptic number.

It is an amenable number.

151561841 is a deficient number, since it is larger than the sum of its proper divisors (7976959).

151561841 is an equidigital number, since it uses as much as digits as its factorization.

151561841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7976958.

The product of its digits is 4800, while the sum is 32.

The square root of 151561841 is about 12311.0454876911. The cubic root of 151561841 is about 533.1670361301.

The spelling of 151561841 in words is "one hundred fifty-one million, five hundred sixty-one thousand, eight hundred forty-one".