1051621633 has 4 divisors (see below), whose sum is σ = 1106970160. Its totient is φ = 996273108.

The previous prime is 1051621619. The next prime is 1051621651. The reversal of 1051621633 is 3361261501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1051621633 - 2⁹ = 1051621121 is a prime.

It is a super-2 number, since 2×1051621633² = 2211816117987173378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051621603) 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, 27674235 + ... + 27674272.

It is an arithmetic number, because the mean of its divisors is an integer number (276742540).

Almost surely, 2^1051621633 is an apocalyptic number.

It is an amenable number.

1051621633 is a deficient number, since it is larger than the sum of its proper divisors (55348527).

1051621633 is an equidigital number, since it uses as much as digits as its factorization.

1051621633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55348526.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1051621633 is about 32428.7161787204. The cubic root of 1051621633 is about 1016.9193327162.

The spelling of 1051621633 in words is "one billion, fifty-one million, six hundred twenty-one thousand, six hundred thirty-three".