151522661 has 4 divisors (see below), whose sum is σ = 151763424. Its totient is φ = 151281900.

The previous prime is 151522603. The next prime is 151522667. The reversal of 151522661 is 166225151.

It is a happy number.

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: 166225151 = 181 ⋅918371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151522661 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 (151522667) 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, 119435 + ... + 120696.

It is an arithmetic number, because the mean of its divisors is an integer number (37940856).

Almost surely, 2^151522661 is an apocalyptic number.

It is an amenable number.

151522661 is a deficient number, since it is larger than the sum of its proper divisors (240763).

151522661 is an equidigital number, since it uses as much as digits as its factorization.

151522661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240762.

The product of its digits is 3600, while the sum is 29.

The square root of 151522661 is about 12309.4541308703. The cubic root of 151522661 is about 533.1210894621.

The spelling of 151522661 in words is "one hundred fifty-one million, five hundred twenty-two thousand, six hundred sixty-one".