30431402 has 4 divisors (see below), whose sum is σ = 45647106. Its totient is φ = 15215700.

The previous prime is 30431371. The next prime is 30431417. The reversal of 30431402 is 20413403.

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

It can be written as a sum of positive squares in only one way, i.e., 27994681 + 2436721 = 5291^2 + 1561^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607849 + ... + 7607852.

Almost surely, 2^30431402 is an apocalyptic number.

30431402 is a deficient number, since it is larger than the sum of its proper divisors (15215704).

30431402 is a wasteful number, since it uses less digits than its factorization.

30431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15215703.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30431402 is about 5516.4664414823. The cubic root of 30431402 is about 312.2055748514.

Adding to 30431402 its reverse (20413403), we get a palindrome (50844805).

The spelling of 30431402 in words is "thirty million, four hundred thirty-one thousand, four hundred two".