1251515316 has 48 divisors (see below), whose sum is σ = 3144415680. Its totient is φ = 385973760.

The previous prime is 1251515281. The next prime is 1251515323. The reversal of 1251515316 is 6135151521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39955 + ... + 64026.

It is an arithmetic number, because the mean of its divisors is an integer number (65508660).

Almost surely, 2^1251515316 is an apocalyptic number.

It is an amenable number.

1251515316 is an abundant number, since it is smaller than the sum of its proper divisors (1892900364).

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

1251515316 is a wasteful number, since it uses less digits than its factorization.

1251515316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104064 (or 104062 counting only the distinct ones).

The product of its digits is 4500, while the sum is 30.

The square root of 1251515316 is about 35376.7623730607. The cubic root of 1251515316 is about 1077.6524558227.

Adding to 1251515316 its reverse (6135151521), we get a palindrome (7386666837).

The spelling of 1251515316 in words is "one billion, two hundred fifty-one million, five hundred fifteen thousand, three hundred sixteen".