1541231531 has 16 divisors (see below), whose sum is σ = 1871458560. Its totient is φ = 1239818400.

The previous prime is 1541231519. The next prime is 1541231581. The reversal of 1541231531 is 1351321451.

It is not a de Polignac number, because 1541231531 - 2¹⁰ = 1541230507 is a prime.

It is a super-2 number, since 2×1541231531² = 4750789264297207922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1541231531.

It is not an unprimeable number, because it can be changed into a prime (1541231581) 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, 39920 + ... + 68381.

It is an arithmetic number, because the mean of its divisors is an integer number (116966160).

Almost surely, 2^1541231531 is an apocalyptic number.

1541231531 is a deficient number, since it is larger than the sum of its proper divisors (330227029).

1541231531 is a wasteful number, since it uses less digits than its factorization.

1541231531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108434.

The product of its digits is 1800, while the sum is 26.

The square root of 1541231531 is about 39258.5217627969. The cubic root of 1541231531 is about 1155.1080978017.

Adding to 1541231531 its reverse (1351321451), we get a palindrome (2892552982).

The spelling of 1541231531 in words is "one billion, five hundred forty-one million, two hundred thirty-one thousand, five hundred thirty-one".