157228077 has 4 divisors (see below), whose sum is σ = 209637440. Its totient is φ = 104818716.

The previous prime is 157228073. The next prime is 157228103. The reversal of 157228077 is 770822751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 157228077 - 2² = 157228073 is a prime.

It is a super-4 number, since 4×157228077⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157228073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26204677 + ... + 26204682.

It is an arithmetic number, because the mean of its divisors is an integer number (52409360).

Almost surely, 2^157228077 is an apocalyptic number.

It is an amenable number.

157228077 is a deficient number, since it is larger than the sum of its proper divisors (52409363).

157228077 is an equidigital number, since it uses as much as digits as its factorization.

157228077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52409362.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 157228077 is about 12539.0620462617. The cubic root of 157228077 is about 539.7301772710.

The spelling of 157228077 in words is "one hundred fifty-seven million, two hundred twenty-eight thousand, seventy-seven".