1531115130 has 32 divisors (see below), whose sum is σ = 3773994624. Its totient is φ = 397262016.

The previous prime is 1531115107. The next prime is 1531115137. The reversal of 1531115130 is 315111351.

It is a junction number, because it is equal to n+sod(n) for n = 1531115097 and 1531115106.

It is not an unprimeable number, because it can be changed into a prime (1531115137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688582 + ... + 690801.

It is an arithmetic number, because the mean of its divisors is an integer number (117937332).

Almost surely, 2^1531115130 is an apocalyptic number.

1531115130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1531115130 is an abundant number, since it is smaller than the sum of its proper divisors (2242879494).

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

1531115130 is a wasteful number, since it uses less digits than its factorization.

1531115130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379430.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 1531115130 is about 39129.4662626517. The cubic root of 1531115130 is about 1152.5752320459.

Adding to 1531115130 its reverse (315111351), we get a palindrome (1846226481).

The spelling of 1531115130 in words is "one billion, five hundred thirty-one million, one hundred fifteen thousand, one hundred thirty".