161954254 has 64 divisors (see below), whose sum is σ = 318776832. Its totient is φ = 59875200.

The previous prime is 161954251. The next prime is 161954263. The reversal of 161954254 is 452459161.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161954251) 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, 244684 + ... + 245344.

It is an arithmetic number, because the mean of its divisors is an integer number (4980888).

Almost surely, 2^161954254 is an apocalyptic number.

161954254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161954254 is a deficient number, since it is larger than the sum of its proper divisors (156822578).

161954254 is a wasteful number, since it uses less digits than its factorization.

161954254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its digits is 43200, while the sum is 37.

The square root of 161954254 is about 12726.1248618737. The cubic root of 161954254 is about 545.0848606741.

It can be divided in two parts, 16195 and 4254, that added together give a square (20449 = 143²).

The spelling of 161954254 in words is "one hundred sixty-one million, nine hundred fifty-four thousand, two hundred fifty-four".