149512531 has 4 divisors (see below), whose sum is σ = 170871472. Its totient is φ = 128153592.

The previous prime is 149512511. The next prime is 149512543. The reversal of 149512531 is 135215941.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 149512531 - 2¹¹ = 149510483 is a prime.

It is a super-2 number, since 2×149512531² = 44707993852051922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149512493 and 149512502.

It is not an unprimeable number, because it can be changed into a prime (149512511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10679460 + ... + 10679473.

It is an arithmetic number, because the mean of its divisors is an integer number (42717868).

Almost surely, 2^149512531 is an apocalyptic number.

149512531 is a deficient number, since it is larger than the sum of its proper divisors (21358941).

149512531 is an equidigital number, since it uses as much as digits as its factorization.

149512531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21358940.

The product of its digits is 5400, while the sum is 31.

The square root of 149512531 is about 12227.5316805969. The cubic root of 149512531 is about 530.7530898462.

The spelling of 149512531 in words is "one hundred forty-nine million, five hundred twelve thousand, five hundred thirty-one".