1531202140 has 24 divisors (see below), whose sum is σ = 3462873120. Its totient is φ = 565366848.

The previous prime is 1531202129. The next prime is 1531202147. The reversal of 1531202140 is 412021351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531202147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2944360 + ... + 2944879.

It is an arithmetic number, because the mean of its divisors is an integer number (144286380).

Almost surely, 2^1531202140 is an apocalyptic number.

1531202140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531202140 is an abundant number, since it is smaller than the sum of its proper divisors (1931670980).

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

1531202140 is a wasteful number, since it uses less digits than its factorization.

1531202140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889261 (or 5889259 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1531202140 is about 39130.5780688198. The cubic root of 1531202140 is about 1152.5970644280.

Adding to 1531202140 its reverse (412021351), we get a palindrome (1943223491).

The spelling of 1531202140 in words is "one billion, five hundred thirty-one million, two hundred two thousand, one hundred forty".