161470155 has 32 divisors (see below), whose sum is σ = 322103808. Its totient is φ = 67104000.

The previous prime is 161470147. The next prime is 161470159. The reversal of 161470155 is 551074161.

It is not a de Polignac number, because 161470155 - 2³ = 161470147 is a prime.

It is a super-2 number, since 2×161470155² = 52145221911448050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161470159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68746 + ... + 71055.

It is an arithmetic number, because the mean of its divisors is an integer number (10065744).

Almost surely, 2^161470155 is an apocalyptic number.

161470155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161470155 is a deficient number, since it is larger than the sum of its proper divisors (160633653).

161470155 is a wasteful number, since it uses less digits than its factorization.

161470155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139827.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 161470155 is about 12707.0907370649. The cubic root of 161470155 is about 544.5412125265.

The spelling of 161470155 in words is "one hundred sixty-one million, four hundred seventy thousand, one hundred fifty-five".