307531242 has 40 divisors (see below), whose sum is σ = 705920292. Its totient is φ = 100008000.

The previous prime is 307531171. The next prime is 307531243. The reversal of 307531242 is 242135703.

307531242 is a `hidden beast` number, since 307 + 5 + 312 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 265657401 + 41873841 = 16299^2 + 6471^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (307531243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16509 + ... + 29792.

Almost surely, 2^307531242 is an apocalyptic number.

307531242 is an abundant number, since it is smaller than the sum of its proper divisors (398389050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

307531242 is a wasteful number, since it uses less digits than its factorization.

307531242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46356 (or 46347 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 307531242 is about 17536.5687065629. The cubic root of 307531242 is about 674.9885627692.

Adding to 307531242 its reverse (242135703), we get a palindrome (549666945).

The spelling of 307531242 in words is "three hundred seven million, five hundred thirty-one thousand, two hundred forty-two".