161225670 has 32 divisors (see below), whose sum is σ = 387944928. Its totient is φ = 42882048.

The previous prime is 161225663. The next prime is 161225693. The reversal of 161225670 is 76522161.

161225670 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 (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5142 + ... + 18678.

It is an arithmetic number, because the mean of its divisors is an integer number (12123279).

Almost surely, 2^161225670 is an apocalyptic number.

161225670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161225670 is an abundant number, since it is smaller than the sum of its proper divisors (226719258).

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

161225670 is a wasteful number, since it uses less digits than its factorization.

161225670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13944.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 161225670 is about 12697.4670702467. The cubic root of 161225670 is about 544.2662403341.

The spelling of 161225670 in words is "one hundred sixty-one million, two hundred twenty-five thousand, six hundred seventy".