1531121414 has 4 divisors (see below), whose sum is σ = 2296682124. Its totient is φ = 765560706.

The previous prime is 1531121407. The next prime is 1531121443. The reversal of 1531121414 is 4141211351.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1531121414.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382780352 + ... + 382780355.

It is an arithmetic number, because the mean of its divisors is an integer number (574170531).

Almost surely, 2^1531121414 is an apocalyptic number.

1531121414 is a deficient number, since it is larger than the sum of its proper divisors (765560710).

1531121414 is an equidigital number, since it uses as much as digits as its factorization.

1531121414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765560709.

The product of its digits is 480, while the sum is 23.

The square root of 1531121414 is about 39129.5465601123. The cubic root of 1531121414 is about 1152.5768088428.

Adding to 1531121414 its reverse (4141211351), we get a palindrome (5672332765).

The spelling of 1531121414 in words is "one billion, five hundred thirty-one million, one hundred twenty-one thousand, four hundred fourteen".