2151497670 has 64 divisors (see below), whose sum is σ = 5909621760. Its totient is φ = 491073408.

The previous prime is 2151497639. The next prime is 2151497687. The reversal of 2151497670 is 767941512.

It is a happy number.

2151497670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149136 + ... + 162924.

It is an arithmetic number, because the mean of its divisors is an integer number (92337840).

Almost surely, 2^2151497670 is an apocalyptic number.

2151497670 is an abundant number, since it is smaller than the sum of its proper divisors (3758124090).

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

2151497670 is a wasteful number, since it uses less digits than its factorization.

2151497670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14549.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 2151497670 is about 46384.2394569535. The cubic root of 2151497670 is about 1290.9624990332.

The spelling of 2151497670 in words is "two billion, one hundred fifty-one million, four hundred ninety-seven thousand, six hundred seventy".