161497152 has 70 divisors (see below), whose sum is σ = 478743518. Its totient is φ = 53830656.

The previous prime is 161497139. The next prime is 161497153. The reversal of 161497152 is 251794161.

161497152 is a `hidden beast` number, since 16 + 1 + 497 + 152 = 666.

It can be written as a sum of positive squares in only one way, i.e., 121352256 + 40144896 = 11016^2 + 6336^2 .

It is a super-2 number, since 2×161497152² = 52162660208222208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161497153) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10393 + ... + 20760.

Almost surely, 2^161497152 is an apocalyptic number.

161497152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161497152 is an abundant number, since it is smaller than the sum of its proper divisors (317246366).

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

161497152 is an equidigital number, since it uses as much as digits as its factorization.

161497152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31177 (or 31158 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 161497152 is about 12708.1529735835. The cubic root of 161497152 is about 544.5715590218.

The spelling of 161497152 in words is "one hundred sixty-one million, four hundred ninety-seven thousand, one hundred fifty-two".