1072157631 has 8 divisors (see below), whose sum is σ = 1504782720. Its totient is φ = 677152152.

The previous prime is 1072157623. The next prime is 1072157633. The reversal of 1072157631 is 1367512701.

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

It is not a de Polignac number, because 1072157631 - 2³ = 1072157623 is a prime.

It is a super-2 number, since 2×1072157631² = 2299043971423064322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1072157592 and 1072157601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072157633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9404835 + ... + 9404948.

It is an arithmetic number, because the mean of its divisors is an integer number (188097840).

Almost surely, 2^1072157631 is an apocalyptic number.

1072157631 is a deficient number, since it is larger than the sum of its proper divisors (432625089).

1072157631 is a wasteful number, since it uses less digits than its factorization.

1072157631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18809805.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 1072157631 is about 32743.8182104653. The cubic root of 1072157631 is about 1023.4961507344.

The spelling of 1072157631 in words is "one billion, seventy-two million, one hundred fifty-seven thousand, six hundred thirty-one".