149531385 has 16 divisors (see below), whose sum is σ = 239402880. Its totient is φ = 79699200.

The previous prime is 149531381. The next prime is 149531399. The reversal of 149531385 is 583135941.

It is not a de Polignac number, because 149531385 - 2² = 149531381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149531381) 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, 40236 + ... + 43794.

It is an arithmetic number, because the mean of its divisors is an integer number (14962680).

Almost surely, 2^149531385 is an apocalyptic number.

149531385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149531385 is a deficient number, since it is larger than the sum of its proper divisors (89871495).

149531385 is a wasteful number, since it uses less digits than its factorization.

149531385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368.

The product of its digits is 64800, while the sum is 39.

The square root of 149531385 is about 12228.3026213780. The cubic root of 149531385 is about 530.7753987860.

The spelling of 149531385 in words is "one hundred forty-nine million, five hundred thirty-one thousand, three hundred eighty-five".