157220007 has 16 divisors (see below), whose sum is σ = 240513792. Its totient is φ = 89487360.

The previous prime is 157219999. The next prime is 157220017. The reversal of 157220007 is 700022751.

It is not a de Polignac number, because 157220007 - 2³ = 157219999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157220017) 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, 9169 + ... + 19962.

It is an arithmetic number, because the mean of its divisors is an integer number (15032112).

Almost surely, 2^157220007 is an apocalyptic number.

157220007 is a deficient number, since it is larger than the sum of its proper divisors (83293785).

157220007 is a wasteful number, since it uses less digits than its factorization.

157220007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29398.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 157220007 is about 12538.7402477282. The cubic root of 157220007 is about 539.7209429215.

Adding to 157220007 its reverse (700022751), we get a palindrome (857242758).

The spelling of 157220007 in words is "one hundred fifty-seven million, two hundred twenty thousand, seven".