2151654261 has 4 divisors (see below), whose sum is σ = 2868872352. Its totient is φ = 1434436172.

The previous prime is 2151654251. The next prime is 2151654269. The reversal of 2151654261 is 1624561512.

2151654261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2151654261 - 2¹⁰ = 2151653237 is a prime.

It is a super-2 number, since 2×2151654261² = 9259232117758912242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151654269) 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, 358609041 + ... + 358609046.

It is an arithmetic number, because the mean of its divisors is an integer number (717218088).

Almost surely, 2^2151654261 is an apocalyptic number.

It is an amenable number.

2151654261 is a deficient number, since it is larger than the sum of its proper divisors (717218091).

2151654261 is an equidigital number, since it uses as much as digits as its factorization.

2151654261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717218090.

The product of its digits is 14400, while the sum is 33.

The square root of 2151654261 is about 46385.9274026078. The cubic root of 2151654261 is about 1290.9938180236.

The spelling of 2151654261 in words is "two billion, one hundred fifty-one million, six hundred fifty-four thousand, two hundred sixty-one".