151250238721 has 4 divisors (see below), whose sum is σ = 152637855700. Its totient is φ = 149862621744.

The previous prime is 151250238719. The next prime is 151250238743. The reversal of 151250238721 is 127832052151.

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

It can be written as a sum of positive squares in 2 ways, for example, as 129157578225 + 22092660496 = 359385^2 + 148636^2 .

It is a cyclic number.

It is not a de Polignac number, because 151250238721 - 2¹ = 151250238719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151250238781) 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, 693808326 + ... + 693808543.

It is an arithmetic number, because the mean of its divisors is an integer number (38159463925).

Almost surely, 2^151250238721 is an apocalyptic number.

It is an amenable number.

151250238721 is a deficient number, since it is larger than the sum of its proper divisors (1387616979).

151250238721 is a wasteful number, since it uses less digits than its factorization.

151250238721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387616978.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 151250238721 in words is "one hundred fifty-one billion, two hundred fifty million, two hundred thirty-eight thousand, seven hundred twenty-one".