151661423 has 4 divisors (see below), whose sum is σ = 153133968. Its totient is φ = 150188880.

The previous prime is 151661417. The next prime is 151661441. The reversal of 151661423 is 324166151.

It is a happy number.

151661423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 151661423 - 2⁴ = 151661407 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 (151661413) 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, 736118 + ... + 736323.

It is an arithmetic number, because the mean of its divisors is an integer number (38283492).

Almost surely, 2^151661423 is an apocalyptic number.

151661423 is a deficient number, since it is larger than the sum of its proper divisors (1472545).

151661423 is a wasteful number, since it uses less digits than its factorization.

151661423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472544.

The product of its digits is 4320, while the sum is 29.

The square root of 151661423 is about 12315.0892404400. The cubic root of 151661423 is about 533.2837810299.

The spelling of 151661423 in words is "one hundred fifty-one million, six hundred sixty-one thousand, four hundred twenty-three".