152231861 has 4 divisors (see below), whose sum is σ = 152272224. Its totient is φ = 152191500.

The previous prime is 152231831. The next prime is 152231873. The reversal of 152231861 is 168132251.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152231861 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 (152231831) 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, 13865 + ... + 22286.

It is an arithmetic number, because the mean of its divisors is an integer number (38068056).

Almost surely, 2^152231861 is an apocalyptic number.

It is an amenable number.

152231861 is a deficient number, since it is larger than the sum of its proper divisors (40363).

152231861 is an equidigital number, since it uses as much as digits as its factorization.

152231861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40362.

The product of its digits is 2880, while the sum is 29.

The square root of 152231861 is about 12338.2276279861. The cubic root of 152231861 is about 533.9515507765.

The spelling of 152231861 in words is "one hundred fifty-two million, two hundred thirty-one thousand, eight hundred sixty-one".