147507481 has 4 divisors (see below), whose sum is σ = 160917264. Its totient is φ = 134097700.

The previous prime is 147507473. The next prime is 147507491. The reversal of 147507481 is 184705741.

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 147507481 - 2³ = 147507473 is a prime.

It is a super-2 number, since 2×147507481² = 43516913901930722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 147507481.

It is not an unprimeable number, because it can be changed into a prime (147507461) 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, 6704875 + ... + 6704896.

It is an arithmetic number, because the mean of its divisors is an integer number (40229316).

Almost surely, 2^147507481 is an apocalyptic number.

147507481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

147507481 is a deficient number, since it is larger than the sum of its proper divisors (13409783).

147507481 is a wasteful number, since it uses less digits than its factorization.

147507481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13409782.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 147507481 is about 12145.2657854820. The cubic root of 147507481 is about 528.3698350612.

The spelling of 147507481 in words is "one hundred forty-seven million, five hundred seven thousand, four hundred eighty-one".