1521131451 has 48 divisors (see below), whose sum is σ = 2419937280. Its totient is φ = 847143360.

The previous prime is 1521131419. The next prime is 1521131459. The reversal of 1521131451 is 1541311251.

It is not a de Polignac number, because 1521131451 - 2⁵ = 1521131419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1521131459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1100781 + ... + 1102161.

It is an arithmetic number, because the mean of its divisors is an integer number (50415360).

Almost surely, 2^1521131451 is an apocalyptic number.

1521131451 is a deficient number, since it is larger than the sum of its proper divisors (898805829).

1521131451 is a wasteful number, since it uses less digits than its factorization.

1521131451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584 (or 1577 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The square root of 1521131451 is about 39001.6852328204. The cubic root of 1521131451 is about 1150.0646343004.

The spelling of 1521131451 in words is "one billion, five hundred twenty-one million, one hundred thirty-one thousand, four hundred fifty-one".