157740225 has 48 divisors (see below), whose sum is σ = 270435072. Its totient is φ = 81077760.

The previous prime is 157740173. The next prime is 157740269. The reversal of 157740225 is 522047751.

157740225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157740225 - 2¹² = 157736129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257019 + ... + 257631.

It is an arithmetic number, because the mean of its divisors is an integer number (5634064).

Almost surely, 2^157740225 is an apocalyptic number.

157740225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157740225 is a deficient number, since it is larger than the sum of its proper divisors (112694847).

157740225 is a wasteful number, since it uses less digits than its factorization.

157740225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 157740225 is about 12559.4675444463. The cubic root of 157740225 is about 540.3155734320.

Adding to 157740225 its reverse (522047751), we get a palindrome (679787976).

The spelling of 157740225 in words is "one hundred fifty-seven million, seven hundred forty thousand, two hundred twenty-five".