2151475456 has 81 divisors (see below), whose sum is σ = 4671254889. Its totient is φ = 988535808.

The previous prime is 2151475439. The next prime is 2151475471. The reversal of 2151475456 is 6545741512.

The square root of 2151475456 is 46384.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 318265600 + 1833209856 = 17840^2 + 42816^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9647761 + ... + 9647983.

Almost surely, 2^2151475456 is an apocalyptic number.

2151475456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2151475456 is the 46384-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151475456

2151475456 is an abundant number, since it is smaller than the sum of its proper divisors (2519779433).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151475456 is an frugal number, since it uses more digits than its factorization.

2151475456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 238 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The cubic root of 2151475456 is about 1290.9580559980.

The spelling of 2151475456 in words is "two billion, one hundred fifty-one million, four hundred seventy-five thousand, four hundred fifty-six".