2151001553 has 2 divisors, whose sum is σ = 2151001554. Its totient is φ = 2151001552.

The previous prime is 2151001507. The next prime is 2151001597. The reversal of 2151001553 is 3551001512.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1734555904 + 416445649 = 41648^2 + 20407^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151001553 - 2²² = 2146807249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151001453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075500776 + 1075500777.

It is an arithmetic number, because the mean of its divisors is an integer number (1075500777).

Almost surely, 2^2151001553 is an apocalyptic number.

It is an amenable number.

2151001553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151001553 is an equidigital number, since it uses as much as digits as its factorization.

2151001553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 2151001553 is about 46378.8912437544. The cubic root of 2151001553 is about 1290.8632630938.

The spelling of 2151001553 in words is "two billion, one hundred fifty-one million, one thousand, five hundred fifty-three".