421550157 has 16 divisors (see below), whose sum is σ = 643381760. Its totient is φ = 240503472.

The previous prime is 421550153. The next prime is 421550167. The reversal of 421550157 is 751055124.

It is not a de Polignac number, because 421550157 - 2² = 421550153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421550153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2107 + ... + 29112.

It is an arithmetic number, because the mean of its divisors is an integer number (40211360).

Almost surely, 2^421550157 is an apocalyptic number.

It is an amenable number.

421550157 is a deficient number, since it is larger than the sum of its proper divisors (221831603).

421550157 is a wasteful number, since it uses less digits than its factorization.

421550157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31872.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 421550157 is about 20531.6866574571. The cubic root of 421550157 is about 749.8074510152.

The spelling of 421550157 in words is "four hundred twenty-one million, five hundred fifty thousand, one hundred fifty-seven".