427771631 has 4 divisors (see below), whose sum is σ = 488881872. Its totient is φ = 366661392.

The previous prime is 427771621. The next prime is 427771633. The reversal of 427771631 is 136177724.

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 427771631 - 2¹⁴ = 427755247 is a prime.

It is a super-2 number, since 2×427771631² = 365977136576800322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427771633) 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, 30555110 + ... + 30555123.

It is an arithmetic number, because the mean of its divisors is an integer number (122220468).

Almost surely, 2^427771631 is an apocalyptic number.

427771631 is a deficient number, since it is larger than the sum of its proper divisors (61110241).

427771631 is an equidigital number, since it uses as much as digits as its factorization.

427771631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61110240.

The product of its digits is 49392, while the sum is 38.

The square root of 427771631 is about 20682.6408130103. The cubic root of 427771631 is about 753.4781449279.

The spelling of 427771631 in words is "four hundred twenty-seven million, seven hundred seventy-one thousand, six hundred thirty-one".