157821954 has 32 divisors (see below), whose sum is σ = 323974464. Its totient is φ = 51226560.

The previous prime is 157821953. The next prime is 157821959. The reversal of 157821954 is 459128751.

It is not an unprimeable number, because it can be changed into a prime (157821953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107892 + ... + 109344.

It is an arithmetic number, because the mean of its divisors is an integer number (10124202).

Almost surely, 2^157821954 is an apocalyptic number.

157821954 is an abundant number, since it is smaller than the sum of its proper divisors (166152510).

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

157821954 is a wasteful number, since it uses less digits than its factorization.

157821954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922.

The product of its digits is 100800, while the sum is 42.

The square root of 157821954 is about 12562.7208040297. The cubic root of 157821954 is about 540.4088741463.

It can be divided in two parts, 1578 and 21954, that added together give a palindrome (23532).

The spelling of 157821954 in words is "one hundred fifty-seven million, eight hundred twenty-one thousand, nine hundred fifty-four".