152331661 has 4 divisors (see below), whose sum is σ = 153053824. Its totient is φ = 151609500.

The previous prime is 152331659. The next prime is 152331667. The reversal of 152331661 is 166133251.

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: 166133251 = 1123 ⋅147937.

It is a cyclic number.

It is not a de Polignac number, because 152331661 - 2¹ = 152331659 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 (152331667) 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, 360765 + ... + 361186.

It is an arithmetic number, because the mean of its divisors is an integer number (38263456).

Almost surely, 2^152331661 is an apocalyptic number.

It is an amenable number.

152331661 is a deficient number, since it is larger than the sum of its proper divisors (722163).

152331661 is an equidigital number, since it uses as much as digits as its factorization.

152331661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722162.

The product of its digits is 3240, while the sum is 28.

The square root of 152331661 is about 12342.2713063682. The cubic root of 152331661 is about 534.0682077491.

The spelling of 152331661 in words is "one hundred fifty-two million, three hundred thirty-one thousand, six hundred sixty-one".