722150421 has 4 divisors (see below), whose sum is σ = 962867232. Its totient is φ = 481433612.

The previous prime is 722150417. The next prime is 722150437. The reversal of 722150421 is 124051227.

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 a cyclic number.

It is not a de Polignac number, because 722150421 - 2² = 722150417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722150391 and 722150400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722150411) 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, 120358401 + ... + 120358406.

It is an arithmetic number, because the mean of its divisors is an integer number (240716808).

Almost surely, 2^722150421 is an apocalyptic number.

It is an amenable number.

722150421 is a deficient number, since it is larger than the sum of its proper divisors (240716811).

722150421 is a wasteful number, since it uses less digits than its factorization.

722150421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240716810.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 722150421 is about 26872.8565842934. The cubic root of 722150421 is about 897.1723686257.

The spelling of 722150421 in words is "seven hundred twenty-two million, one hundred fifty thousand, four hundred twenty-one".