146561331 has 16 divisors (see below), whose sum is σ = 231033600. Its totient is φ = 80861088.

The previous prime is 146561321. The next prime is 146561333. The reversal of 146561331 is 133165641.

146561331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 146561331 - 2⁵ = 146561299 is a prime.

It is a super-2 number, since 2×146561331² = 42960447488983122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (146561333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119721 + ... + 120938.

It is an arithmetic number, because the mean of its divisors is an integer number (14439600).

Almost surely, 2^146561331 is an apocalyptic number.

146561331 is a deficient number, since it is larger than the sum of its proper divisors (84472269).

146561331 is a wasteful number, since it uses less digits than its factorization.

146561331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240698.

The product of its digits is 6480, while the sum is 30.

The square root of 146561331 is about 12106.2517320598. The cubic root of 146561331 is about 527.2377121209.

The spelling of 146561331 in words is "one hundred forty-six million, five hundred sixty-one thousand, three hundred thirty-one".