1531213004 has 6 divisors (see below), whose sum is σ = 2679622764. Its totient is φ = 765606500.

The previous prime is 1531213003. The next prime is 1531213037. The reversal of 1531213004 is 4003121351.

It is a super-2 number, since 2×1531213004² = 4689226527237408032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1531213003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191401622 + ... + 191401629.

It is an arithmetic number, because the mean of its divisors is an integer number (446603794).

Almost surely, 2^1531213004 is an apocalyptic number.

It is an amenable number.

1531213004 is a deficient number, since it is larger than the sum of its proper divisors (1148409760).

1531213004 is a wasteful number, since it uses less digits than its factorization.

1531213004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382803255 (or 382803253 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1531213004 is about 39130.7168858430. The cubic root of 1531213004 is about 1152.5997903439.

Adding to 1531213004 its reverse (4003121351), we get a palindrome (5534334355).

The spelling of 1531213004 in words is "one billion, five hundred thirty-one million, two hundred thirteen thousand, four".