31545421010 has 8 divisors (see below), whose sum is σ = 56781757836. Its totient is φ = 12618168400.

The previous prime is 31545421003. The next prime is 31545421057. The reversal of 31545421010 is 1012454513.

It can be written as a sum of positive squares in 2 ways, for example, as 28428320449 + 3117100561 = 168607^2 + 55831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31545421010² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577271041 + ... + 1577271060.

Almost surely, 2^31545421010 is an apocalyptic number.

31545421010 is a deficient number, since it is larger than the sum of its proper divisors (25236336826).

31545421010 is a wasteful number, since it uses less digits than its factorization.

31545421010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154542108.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 31545421010 its reverse (1012454513), we get a palindrome (32557875523).

The spelling of 31545421010 in words is "thirty-one billion, five hundred forty-five million, four hundred twenty-one thousand, ten".