146631081 has 4 divisors (see below), whose sum is σ = 195508112. Its totient is φ = 97754052.

The previous prime is 146631071. The next prime is 146631097. The reversal of 146631081 is 180136641.

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 not a de Polignac number, because 146631081 - 2²³ = 138242473 is a prime.

It is a super-2 number, since 2×146631081² = 43001347830457122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146631011) 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, 24438511 + ... + 24438516.

It is an arithmetic number, because the mean of its divisors is an integer number (48877028).

Almost surely, 2^146631081 is an apocalyptic number.

It is an amenable number.

146631081 is a deficient number, since it is larger than the sum of its proper divisors (48877031).

146631081 is an equidigital number, since it uses as much as digits as its factorization.

146631081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48877030.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 146631081 is about 12109.1321324032. The cubic root of 146631081 is about 527.3213380858.

The spelling of 146631081 in words is "one hundred forty-six million, six hundred thirty-one thousand, eighty-one".