152220661 has 8 divisors (see below), whose sum is σ = 154306944. Its totient is φ = 150146880.

The previous prime is 152220637. The next prime is 152220671. The reversal of 152220661 is 166022251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152220661 is a prime.

It is a super-2 number, since 2×152220661² = 46342259270553842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152220671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22836 + ... + 28738.

It is an arithmetic number, because the mean of its divisors is an integer number (19288368).

Almost surely, 2^152220661 is an apocalyptic number.

It is an amenable number.

152220661 is a deficient number, since it is larger than the sum of its proper divisors (2086283).

152220661 is a wasteful number, since it uses less digits than its factorization.

152220661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 152220661 is about 12337.7737456966. The cubic root of 152220661 is about 533.9384558304.

It can be divided in two parts, 152220 and 661, that added together give a square (152881 = 391²).

The spelling of 152220661 in words is "one hundred fifty-two million, two hundred twenty thousand, six hundred sixty-one".