146631381 has 8 divisors (see below), whose sum is σ = 210547680. Its totient is φ = 90234672.

The previous prime is 146631367. The next prime is 146631391. The reversal of 146631381 is 183136641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 146631381 - 2⁵ = 146631349 is a prime.

It is a super-2 number, since 2×146631381² = 43001523787934322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146631301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1879851 + ... + 1879928.

It is an arithmetic number, because the mean of its divisors is an integer number (26318460).

Almost surely, 2^146631381 is an apocalyptic number.

It is an amenable number.

146631381 is a deficient number, since it is larger than the sum of its proper divisors (63916299).

146631381 is a wasteful number, since it uses less digits than its factorization.

146631381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759795.

The product of its digits is 10368, while the sum is 33.

The square root of 146631381 is about 12109.1445197421. The cubic root of 146631381 is about 527.3216977100.

The spelling of 146631381 in words is "one hundred forty-six million, six hundred thirty-one thousand, three hundred eighty-one".