157215143723 has 4 divisors (see below), whose sum is σ = 171507429528. Its totient is φ = 142922857920.

The previous prime is 157215143689. The next prime is 157215143747. The reversal of 157215143723 is 327341512751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157215143723 - 2⁸ = 157215143467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157215143753) 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, 7146142886 + ... + 7146142907.

It is an arithmetic number, because the mean of its divisors is an integer number (42876857382).

Almost surely, 2^157215143723 is an apocalyptic number.

157215143723 is a deficient number, since it is larger than the sum of its proper divisors (14292285805).

157215143723 is a wasteful number, since it uses less digits than its factorization.

157215143723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14292285804.

The product of its digits is 176400, while the sum is 41.

The spelling of 157215143723 in words is "one hundred fifty-seven billion, two hundred fifteen million, one hundred forty-three thousand, seven hundred twenty-three".