1051553215 has 16 divisors (see below), whose sum is σ = 1317938688. Its totient is φ = 803926816.

The previous prime is 1051553203. The next prime is 1051553219. The reversal of 1051553215 is 5123551501.

It is a cyclic number.

It is not a de Polignac number, because 1051553215 - 2⁵ = 1051553183 is a prime.

It is a super-2 number, since 2×1051553215² = 2211528327953672450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051553219) 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, 143982 + ... + 151108.

It is an arithmetic number, because the mean of its divisors is an integer number (82371168).

Almost surely, 2^1051553215 is an apocalyptic number.

1051553215 is a deficient number, since it is larger than the sum of its proper divisors (266385473).

1051553215 is a wasteful number, since it uses less digits than its factorization.

1051553215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1051553215 is about 32427.6612631870. The cubic root of 1051553215 is about 1016.8972788096.

The spelling of 1051553215 in words is "one billion, fifty-one million, five hundred fifty-three thousand, two hundred fifteen".