162121554 has 64 divisors (see below), whose sum is σ = 435974400. Its totient is φ = 43593984.

The previous prime is 162121529. The next prime is 162121559. The reversal of 162121554 is 455121261.

162121554 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 (27).

It is not an unprimeable number, because it can be changed into a prime (162121559) 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, 6189 + ... + 19040.

It is an arithmetic number, because the mean of its divisors is an integer number (6812100).

Almost surely, 2^162121554 is an apocalyptic number.

162121554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

162121554 is an abundant number, since it is smaller than the sum of its proper divisors (273852846).

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

162121554 is a wasteful number, since it uses less digits than its factorization.

162121554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25264 (or 25258 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 162121554 is about 12732.6962580594. The cubic root of 162121554 is about 545.2724883777.

It can be divided in two parts, 16212 and 1554, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 162121554 in words is "one hundred sixty-two million, one hundred twenty-one thousand, five hundred fifty-four".