161355502 has 16 divisors (see below), whose sum is σ = 301756032. Its totient is φ = 62865720.

The previous prime is 161355499. The next prime is 161355533. The reversal of 161355502 is 205553161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523728 + ... + 524035.

It is an arithmetic number, because the mean of its divisors is an integer number (18859752).

Almost surely, 2^161355502 is an apocalyptic number.

161355502 is a deficient number, since it is larger than the sum of its proper divisors (140400530).

161355502 is a wasteful number, since it uses less digits than its factorization.

161355502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047783.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 161355502 is about 12702.5785571277. The cubic root of 161355502 is about 544.4122969249.

It can be divided in two parts, 1 and 61355502, that added together give a triangular number (61355503 = T₁₁₀₇₇).

The spelling of 161355502 in words is "one hundred sixty-one million, three hundred fifty-five thousand, five hundred two".