1521948011 has 4 divisors (see below), whose sum is σ = 1547743800. Its totient is φ = 1496152224.

The previous prime is 1521947989. The next prime is 1521948041. The reversal of 1521948011 is 1108491251.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521948011 is a prime.

It is a super-2 number, since 2×1521948011² = 4632651496373712242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521948041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12897806 + ... + 12897923.

It is an arithmetic number, because the mean of its divisors is an integer number (386935950).

Almost surely, 2^1521948011 is an apocalyptic number.

1521948011 is a deficient number, since it is larger than the sum of its proper divisors (25795789).

1521948011 is an equidigital number, since it uses as much as digits as its factorization.

1521948011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25795788.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 1521948011 is about 39012.1520939309. The cubic root of 1521948011 is about 1150.2703865796.

The spelling of 1521948011 in words is "one billion, five hundred twenty-one million, nine hundred forty-eight thousand, eleven".